英語聽力 學英語,練聽力,上聽力課堂! 注冊 登錄
> 在線聽力 > 英語高級聽力 > 英語時差 >  第781篇

英語時差:白蟻

所屬教程:英語時差

瀏覽:

2021年02月20日

手機版
掃描二維碼方便學習和分享
https://online2.tingclass.net/lesson/shi0529/10000/10183/781.mp3
https://image.tingclass.net/statics/js/2012
Any creature that threatens to eat your wood furniture and structural beams presents a major problem. That's why a termite infestation is usually cause for alarm, followed by chemical extermination. Yet termites are as fascinating as they are potentially alarming. If you were able to shrink and infiltrate a termite colony you'd notice four distinct groups: workers, soldiers, immature individuals, and reproductives. The workers are the Cinderellas of the termite world; blind, sterile, and wingless, they tend the eggs, feed the soldiers and young termites, and maintain the nest.

Soldiers defend the colony from predators, the most dangerous being tribes of attacking ants. Although not as big and strong as their ant enemies, soldiers are equipped with an arsenal of physical and chemical weapons. Some termites use sharp teeth to bite an attacker and then coat the wound with an anti-clotting chemical, causing the enemy to bleed to death. Other weapons include a paint-brush like device used to daub poison on enemies and a longish, hose-like snout used to spray toxins on attackers.

Of the four groups, the reproductives might have the best job. Sealed off in a chamber and tended to by workers, the one pair of active reproductive termites reproduce as often as possible. But the king and queen, as they are known, are more than just pampered monarchs. The queen, for one, is also a chemist. Alerted to the needs of the colony by her workers, the queen can secrete chemicals that, when fed to the colony's adolescent termites, turn them into soldiers, workers, or future reproductives, as needed. In this way, the termite queen both propagates and protects her brood.

用戶搜索

瘋狂英語 英語語法 新概念英語 走遍美國 四級聽力 英語音標 英語入門 發(fā)音 美語 四級 新東方 七年級 賴世雄 zero是什么意思武漢市世茂林嶼岸(別墅)英語學習交流群

網(wǎng)站推薦

英語翻譯英語應急口語8000句聽歌學英語英語學習方法

  • 頻道推薦
  • |
  • 全站推薦
  • 推薦下載
  • 網(wǎng)站推薦