久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

您現在的位置: Language Tips> Easy English> Odd Question  
 





 
飛蛾為什么撲火
[ 2007-12-07 17:24 ]

漢語中有句成語叫“飛蛾撲火,自取滅亡”。為什么蛾子看到火會不要命的往上撲呢?難道它們傻嗎?還是執行什么殉道儀式?下面這篇文章可以告訴您飛蛾撲火的原因。

To understand this phenomenon, you need to know about phototaxis. It is an organism's automatic movement toward or away from light. Moths are positively phototactic. They seem charmed by your porch light, your headlights or your campfire. While there is no definitive explanation for this phenomenon, there are some interesting theories.

Some types of moths are known to migrate, and it's possible that the night sky gives them navigational clues. A moth's up-down orientation might depend in part on the brightness of the sky relative to the ground. Some lepidopterists suggest that moths use the moon as a primary reference point and have the ability to calibrate their flight paths as the Earth's rotation causes the moon to move across the sky.

It's also possible that moths have an escape-route mechanism related to light. Imagine disturbing a bush-full of moths at night -- they all fly up and out of the bush, toward the sky. To a moth in danger, flying toward the light tends to be a more advantageous response than flying toward darkness.

Moths are more sensitive to some wavelengths of light - ultraviolet, for example - than they are to others. A white light will attract more moths than a yellow light. Yellow is a wavelength moths don't respond to.

Another interesting question is: Why do moths stay at lights? A moth's eyes, like a human's eyes, contain light sensors and adjust according to the amount of light the sensors detect. In high illumination, light from each of the moth's thousands of fixed-focus lens facets is channeled to its own sensor. In low illumination, light from multiple lenses is channeled to the same ommatidium to increase light sensitivity. You probably experience a few moments of blindness when you turn on a bright light after your eyes have adjusted to darkness, or when you are suddenly in darkness after being in bright light. A moth's dark-adapting mechanism responds much more slowly than its light-adapting mechanism. Once the moth comes close to a bright light, it might have a hard time leaving the light since going back into the dark renders it blind for so long. In the case that the moth escapes, it won't remember the problem with flying too near the light and will probably find itself in the same predicament all over again.

phototaxis:趨光性

positively phototactic:向光的

lepidopterist:磷翅類昆蟲學者

calibrate:校準

lens: 晶狀體

ommatidium :小眼,節肢動物復眼的延長結構之一

(來源:coolquiz.com 英語點津 Annabel 編輯)

我想了解更多趣味百科知識
 
 
相關文章 Related Stories
 
 
 

本頻道最新推薦

     
  為什么下雪時天氣暖
  You are the smartest fish I've ever seen!
  Dog burger
  為什么老了脾氣好
  飛蛾為什么撲火

論壇熱貼

     
  開個題目大家扯:hotel & restaurant
  追求某人
  請教工商年檢如何翻譯
  How to translate “中國老字號”into English?
  "港股直通車"怎么翻譯?
  兩免一補怎么說?




主站蜘蛛池模板: 欧美在线二区 | 在线精品日韩一区二区三区 | 亚洲国产成+人+综合 | 欧美成人第一页 | 高清在线一区二区三区亚洲综合 | 久久精品视频播放 | 国产欧美一区二区三区在线看 | 国产日产久久高清欧美一区 | 永久免费毛片手机版在线看 | 亚洲在线观看网站 | 免费国产a | 国产成人啪精品 | 女人张开腿让男人桶免费网站 | 成年人黄色片 | 91免费视频版 | 亚洲深夜福利视频 | 免费亚洲成人 | 97视频在线观看免费播放 | 欧美日韩一区二区三区高清不卡 | 国产3区| 国产精品二区三区免费播放心 | 欧美黄网站免费观看 | 一区二区三区视频观看 | 国内精品久久久久影院老司 | 欧美日韩国产一区二区三区播放 | 最新最好看免费毛片基地 | 久久精品成人免费看 | 91精品日本久久久久久牛牛 | 一级做a爰片久久毛片鸭王 一级做a爰全过程免费视频毛片 | 久久青草免费免费91线频观看 | 亚洲国产精品综合久久一线 | 特黄毛片 | 在线人成精品免费视频 | 久艹视频在线免费观看 | 97在线视频免费观看 | 日韩国产中文字幕 | 日本特黄特色大片免费看 | 99精品免费在线 | 性刺激久久久久久久久 | 亚洲最大情网站在线观看 | 国产一区二区在免费观看 |