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标题: 926二战分手失败放狗 [打印本页]

作者: mescalccccc 时间: 2018-9-26 12:45
标题: 926二战分手失败放狗
粘不过来直接贴图了，其他的等想到再发上来

作者: billyisfragile! 时间: 2018-9-26 13:05
是原文吗？
http://www.naturalhistorymag.com/htmlsite/0702/0702_feature.html

They look like the curlicue-topped mountain that overlooks the Grinch’s Whoville: cones of soil and sand, up to thirty feet tall, topped with earthen spires pointing toward the noon sun. Common on the savannas of southern Africa, they are termite mounds, constructed by the fungus-cultivating termite Macrotermes michaelseni. Locals call these structures "ant heaps." In Afrikaans, termites are rysmeere (literally, rice ants); sometimes the insects are called white ants. Termites are not ants, however: their ancestors are social cockroaches, not the wasps from which ants descend. And neither is the termite mound a heap, a haphazard pile of dirt. Opening it reveals a complicated internal architecture: a capacious central chimney from which radiates a complex network of passages, connecting ultimately to an array of thin-walled tunnels that lie under the mound’s surface like veins on an arm. Most interesting, though, is what you do not see: termites. The mound is not a habitation for the millions of termites that built it. Their residence is a nest below the mound, a spherical underground city about six feet in diameter.

Entomologists have long ascribed respiratory functions to these termite mounds, and for many years they thought the mound’s workings were pretty well understood. It was a fine story, first told in the late 1950s by Swiss scientist Martin Lüscher, who was investigating the mounds of Macrotermes natalensis. Lüscher had the ingenious, but at best only partly correct, idea that a colony’s metabolism could power its ventilation and maintain the nest’s remarkably constant temperature. The energy of the termites’ collective "hot breath" heated the air in the nest, Lüscher surmised, and the warmed air would waft up through the mound’s tunnels. The air rising from the nest would eventually cool and pass down again through the conduits near the mound’s surface. In these passages, the air would be refreshed by diffusion through the structure’s porous walls before being sent on another circuit through the nest.

A puzzling question remains, however. The fungi are the major heavy breathers in the nest, consuming oxygen about five times faster than the termites do. Why, then, do the termites work so hard to build an earthen lung if the fungi, Termitomyces, actually do the most to make the nest air stuffy? To be sure, the act is not altruistic, because the fungi, by breaking down the termites’ food, are performing a critical function. In a sense, the termites are "paid" for their work. But the fungi may be gaining much more than simply having termites supply them with a steady diet of cellulose: Termitomyces, you see, have competitors.

作者: Melene 时间: 2018-9-26 13:49
感谢分享！

作者: alice8513 时间: 2018-9-26 14:33
对是原文

作者: billyisfragile! 时间: 2018-9-26 14:43

alice8513 发表于 2018-9-26 14:33
对是原文

你是今天考的吗？能回忆/分享一些月度吗？

作者: alice8513 时间: 2018-9-26 14:58

bzy! 发表于 2018-9-26 14:43
你是今天考的吗？能回忆/分享一些月度吗？

一会发帖哈哈哈，记得超级多

作者: billyisfragile! 时间: 2018-9-26 15:16

alice8513 发表于 2018-9-26 14:58
一会发帖哈哈哈，记得超级多

感激不尽。

作者: 白菜菜菜 时间: 2018-9-26 15:17
谢谢楼主~加油！

作者: 三磷酸腺苷 时间: 2018-9-26 16:13
感谢分享！

作者: Cynthia_1 时间: 2018-9-26 19:26

bzy! 发表于 2018-9-26 13:05
是原文吗？
http://www.naturalhistorymag.com/htmlsite/0702/0702_feature.html

请问这种长篇的阅读机经是在哪里看的呀谢谢你！

作者: baozi1110 时间: 2018-9-26 21:55
核桃那个题，核桃原来多少不是给了吗。。怎么还求这个呢？

作者: buzaoai 时间: 2018-9-26 22:17
楼主请问还记得作文吗？

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