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usrpb200為什么那么貴?
這種軟件無線電的東西都很貴,原裝的更貴,個人感覺是usrp的開發(fā)接口,支持軟件做的很好,gnuradio很好用,硬件性能也可以,所以貴是肯定的,想便宜點(diǎn)的話rtl-sdr,很便宜,或者h(yuǎn)ackrf one,1200左右一個

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英語丑小鴨的故事?
Ugly Duckling
The countryside was lovely. It was summer. The wheat was golden and the oats were still green. The hay was stacked in the low-lying meadows. There lay great woods around the fields and meadows. There were deep lakes in the midst of the woods. In the sunniest spot stood an old mansion surrounded by a deep moat. Great leaves grew from the vines on the walls of the house right down to the water's edge. Some of the leaves were so big that a child could use them as an umbrella.
In the depths of a forest a duck was sitting in her nest. Her little ducklings were about to be hatched.
At last one egg after another began to crack." Cheep, cheep!" the ducklings said." Quack, quack!" said the duck. " How big the world is!" said all the young ones.
But the biggest egg was still there. And then she settled herself on the nest again.
"Well, how are you getting on?" said an old duck who came to pay her a visit." This egg is taking such a long time," answered the sitting duck."
The shell will not crack, but the others are the finest ducklings. They are like their father."
"let me look at the egg which won't crack," said the old duck." You may be sitting on a turkey's egg! I have been cheated like that once. Yes. it's a turkey's egg! You had better leave it alone and teach the other children to swim."
"I will sit on it a little longer."
At last the big egg cracked. How big and ugly the baby was! " That is a very big duckling." she said, " None of the others look like that. Can he be a turkey's chick? I will soon find out. I will make him go into water."
The next day the mother duck with her family went down to the moat. She said, and one duckling jumped in after another.
The big ugly one swam about with them." No, that is no turkey," she said," Quack, quack! Now come with me and I will take you into the world. Keep close to me all the time. Be careful of the cat!" The first day passed, and everything was fine.
Afterwards, matters grew worse and worse. The poor duckling was chased and harassed by all the ducklings because he was very ugly.The ducks bit him, the hens pecked him. and the girl who fed them kicked him aside. Then he ran off and soon came to a great marsh where the wild ducks lived.
He was so tired and miserable that he stayed there the whole night.
In the morning the wild ducks flew up to see their new friend." You are very ugly," said the wild ducks," but that does not matter to us." He stayed there two whole days . And then two wild geese came. Just at that moment the sound of "Bang! Bang!" was heard, and both the wild geese fell dead among the reeds.
It was a terrible shock to the poor duckling.
A big dog appeared close beside him. He showed his sharp teeth and went on without touching him.
"Oh, thank Heaven! I am so ugly that even the dog won't bite me!" sighed the duckling.
In the evening he reached a little cottage where an old woman lived with her cat and her hen. Her eyesight was not good, and she thought the duckling was a fat duck. will be rich if I have duck eggs," she said. So she took in the duckling for three weeks, but he laid no eggs.
The cat was the master of the house and the hen was the mistress.
"Can you lay eggs?" asked the hen.
"No," answered the duckling.
"Then you had better go out into the wide world," said the cat. So away went the duckling.
One evening the sun was just setting when a flock of beautiful large birds appeared out of the bushes.
The duckling thought," I've never seen anything so beautiful."
They were dazzlingly white with long necks. They were swans. He did not know what the birds were.
The winter was so bitterly cold that the duckling swam about in the water to keep himself from freezing.
The sun began to shine warmly again. The larks were singing and beautiful spring had come. Then, all at once, the duckling raised his wings and they flapped with much greater strength than before. Before he knew it, he found himself in a large garden where the apple trees were in full blossom and long branches of lilacs overhung the shores of the lake.
Just in front of him he saw three beautiful white swans swimming towards him.
"I will fly to them and they will hack me to pieces because I am so ugly. But it doesn't matter. I would rather be killed by them than be bitten by the ducks or pecked by the hens." So he flew into the water and swam towards the swans. They saw him and darted towards him.
"Kill me! Oh, kill me!" said the poor duckling, and he waited for his death bowing his head towards the water.
But what did he see in the clear water? He was no longer a dark gray ugly bird. He was himself a swan!
Some children came into the garden with corn and pieces of bread, which they threw into the water.
The smallest child shouted with joy," There is a new one." The other children shouted, "Yes, a new one has come."
He said to himself, " I never dreamed that I could be so happy when I was the ugly duckling!"
拓展資料:
作者簡介:
漢斯·克里斯蒂安·安徒生(HeinzChristianAndersen1805—1875)丹麥作家。1805年4月2日生于丹麥菲英島歐登塞的貧民區(qū)。父親是個窮鞋匠,曾志愿服役,抗擊拿破侖·波拿巴的侵略,退伍后于1816年病故。
當(dāng)洗衣工的母親不久即改嫁。安徒生從小就為貧困所折磨,先后在幾家店鋪里做學(xué)徒,沒有受過正規(guī)教育。少年時代即對舞臺發(fā)生興趣,幻想當(dāng)一名歌唱家、演員或劇作家。1819年在哥本哈根皇家劇院當(dāng)了一名小配角。后因嗓子失潤被解雇。從此開始學(xué)習(xí)寫作,但寫的劇本完全不適宜于演出,沒有為劇院所采用。
1822年得到劇院導(dǎo)演約納斯·科林的資助,就讀于斯萊厄爾瑟的一所文法學(xué)校。這一年他寫了《青年的嘗試》一書,以威廉·克里斯蒂安·瓦爾特的筆名發(fā)表。這個筆名包括了威廉·莎士比亞、安徒生自己和司各特的名字。
1827年發(fā)表第一首詩《垂死的小孩》 ,1829年,他進(jìn)入哥本哈根大學(xué)學(xué)習(xí)。他的第一部重要作品《1828和1829年從霍爾門運(yùn)河至阿邁厄島東角步行記》于1829年問世。這是一部富于幽默感的游記,頗有德國作家霍夫曼的文風(fēng)。這部游記的出版使安徒生得到了社會的初步承認(rèn)。此后他繼續(xù)從事戲劇創(chuàng)作。
1831年他去德國旅行,歸途中寫了旅游札記。1833年去意大利,創(chuàng)作了一部詩劇《埃格內(nèi)特和美人魚》和一部以意大利為背景的長篇小說《即興詩人》(1835)。小說出版后不久,就被翻譯成德文和英文,標(biāo)志著作者開始享有國際聲譽(yù)。
寓意:比喻不被關(guān)注的小孩子或年輕人,有時也指剛剛出現(xiàn)、不為人注意的事物。丑小鴨歷經(jīng)千辛萬苦、重重磨難之后變成了白天鵝,那是因?yàn)樗闹杏兄鴫粝?,夢想支撐著它。是金子早晚會發(fā)光。命運(yùn)其實(shí)沒有軌跡,關(guān)鍵在于對美好境界、美好理想的追求。人生中的挫折和痛苦是不可避免的,要學(xué)會把它們踩在腳下,每個孩子都會有一份屬于自己的夢想,只要他們學(xué)會樹立生活目標(biāo),在自信、自強(qiáng)、自立中成長,通過拼搏他們會真正的認(rèn)識到自己原來也可以變成“白天鵝”,也可以像丑小鴨一樣實(shí)現(xiàn)心中的夢想,人只要有了夢想,那么,困難也不再是困難了。
速度與激情特別行動片頭曲?
歌名是《Time in a Bottle》,它是由美國民謠搖滾歌手Jim Croce演唱,歌詞如下:
Time in a Bottle
譜曲:Jim Croce
制作人:Terry Cashman
填詞:Jim Croce
歌曲原唱:Jim Croce
If I could save time in a bottle
如果我可以把時光保存在瓶子里
The first thing that I like to do
我想做的第一件事
Is to save everyday till eternity passes away
就是保存每一天,直到永恒消逝
Just to spend them with you
然后與你一同分享
If I could make days last forever
如果我可以使時光停駐
If words could make wishes come true
如果言語可以使夢想成真
I'd save everyday like a treasure
我會把每天像寶藏一樣保存下來
And then again I would spend them with you
然后,再次與你分享
But there never seem to be enough time
但是,時間似乎永遠(yuǎn)不夠
to do the things you want to do
讓你去做你想做的事
Once you've found them
一旦你已察覺
I've looked around enough to know
四處尋覓,我已明了
That you're the one I want to go through the time with
你就是我想要一起共度時光的人
If I had a box
如果我有一個盒子
just for wishes and dreams that had never come true
收集了未曾實(shí)現(xiàn)的愿望和夢想
The box would be empty
盒子里面可能是空的
Except for the memory of how they were answered by you
除了你有所響應(yīng)的回憶以外
But there never seem to be enough time
但是,時間似乎永遠(yuǎn)不夠
to do the things you want to do
讓你去做你想做的事
Once you've found them
一旦你已察覺
I've looked around enough to know
四處尋覓,我已明了
That you're the one I want to go through the time with
你就是我想要一起共度時光的人
hackrfone聽短波廣播好嗎?
還可以。正好手里有一臺!如果是新手入門的話是非常好的選擇,價格也合理。如果要全雙工工作,另選其他的吧。本振干擾肯定是有的。。。
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