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: 无码免费一区二区三区免费播放 | 国产成人精品视频在放 | 国亚洲欧美日韩精品 | 亚洲国产精品a一区二区三区 | 国产农村一二三区 | 超清国产粉嫩456在线免播放 | 免费99视频 | 亚洲一区二区三区在线播放 | 久久国产午夜精品理论片34页 | 男人的天堂在线观看视频不卡 | 国产视频a区 | 亚洲资源在线播放 | 亚洲一区二区视频 | 三级c欧美做人爱视频 | 日韩精品一区二区三区视频 | 亚洲一区国产 | 国产成人亚洲综合欧美一部 | 韩国日本三级在线观看 | 久久视屏这里只有精品6国产 | 欧美成人xxxx | 亚洲欧美日韩中文字幕在线一区 | 亚洲国产成人久久笫一页 | 热99re久久精品精品免费 | 日本一视频一区视频二区 | 亚洲精美视频 | 成人免费的性色视频 | 美日韩一区二区 | 免费人成在线观看网站 | 美国毛片aa | 午夜爽爽爽| 精品欧美一区二区三区精品久久 | jyzzjyzz国产免费观看 | 免费久久精品 | 免费人成在线观看视频不卡 | 亚洲天堂免费看 | 萌白酱喷水福利视频在线 | 国产91成人精品亚洲精品 | 中文字幕一区中文亚洲 | 免费在线看a | 欧美午夜影院 | 日韩欧美精品综合一区二区三区 |