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小詞典－中微子

来源：日期：2015-11-20 14:07:23

中微子在宇宙中大量存在，每秒鍾穿過人體的中微子多達幾萬億個。然而，要發現並捕獲它們卻異常困難，因爲它們形同幽靈，來無影去無蹤。

中微子是一种神秘的宇宙粒子，具有不可思议的极强的穿透能力，能够自由地穿过墙壁、山脉、甚至地球与其他行星。物理学家估计，中微子能够自由穿透厚度比地球到太阳的距离还高出几十亿倍的铁板。如果有数光年厚的一个铅做成的壁垒的话，中微子也能从容穿过。

　　自由穿行于宇宙空間、

星系、行星的中微子流，能夠傳遞超新星與宇宙深處未知情況的獨特信息。將來的發現可能會幫助我們揭開宇宙形成的奧秘。

"I was able on this journey, and partly in consequence of my lameness, to have an opportunity to see the great kindness of the Japanese to each other. I had my servant with me (a Japanese boy who spoke English), and he was in a jin-riki-sha with two men to pull it, the same as mine. When we came to a bad spot in the road, the men with his carriage dropped it and came to the aid of mine; and as soon as they had brought it through its troubles, the whole four went back to bring up the other. I did not hear a single expression of anger during the whole day, but everything was done with the utmost good-nature. In some other countries it is quite possible that the men with the lighter burden would adhere to the principle that everybody should look out for himself, and decline to assist unless paid extra for their trouble. In the shadows Hetty listened to as much of the talk as she could hear. But nobody was going to leave the house without her knowledge. Behind the hangings in the hall she waited. Her patience was not unduly tried. There was a light footstep presently, a pause as if of precaution, and the Countess came downstairs. Her hair had become blonde, there was a lace shawl over her head, her skirts were short and trim. Then everyone began to talk at once, as accusations flew back and forth. The yells that soon rose from that thicket would have indicated that either a boy was being skinned alive or was having his face washed by his mother. Reuben banged the table with his fist. "Write to Simon Sudbury!" HoME 凤凰视频一级a 免费ENTER NUMBET 002100goo.com.cn
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