https://online2.tingclass.net/lesson/shi0529/0009/9697/79.mp3
https://image.tingclass.net/statics/js/2012
Have you ever walked into a swarm of insects—gnats,mosquitoes, or one of their many cousins–and thenfound yourself unable to shake the swarm? You fakeleft, go right, but the little buggers still hoverabove. As if it that weren’t bad enough, did youknow your head had just become the happeningscene, where every hip gnat wants to be–in otherwords, the insect world’s equivalent of a singles'bar? That’s right, swarms are places for the sexes tomeet and greet. The first time an entomologistreported the purpose of swarms was in 1906.Frederick Knab wrote that he’d netted 901 mosquitoes from a swarm, but only 4 were females!
你曾走進(jìn)過(guò)昆蟲(chóng)的世界嗎?——飛蟲(chóng),蚊子,或他們的表兄弟——然后發(fā)現(xiàn)自己無(wú)法撼動(dòng)這群昆蟲(chóng)?你假裝離開(kāi),向右走,但小昆蟲(chóng)們?nèi)匀慌腔苍谏厦?。看還來(lái)這還不夠糟糕,你知道你頭上所發(fā)生的場(chǎng)景嗎?那已經(jīng)成為小飛蟲(chóng)想前往的地方。換句話說(shuō),昆蟲(chóng)群相當(dāng)于一個(gè)單身盤(pán)對(duì)酒吧?說(shuō)對(duì)了,昆蟲(chóng)群正是雌、雄昆蟲(chóng)相見(jiàn)和問(wèn)候的地方。昆蟲(chóng)學(xué)家首次報(bào)道了昆蟲(chóng)聚集成群的目的是在1906年。Frederick Knab寫(xiě)道,他從飛蟲(chóng)群中捕捉了901只蚊子,但只有4只是雌性的!