评论
打印
But an unguarded chick is desperately vulnerable.
然而无人看管的雏鸟极其脆弱
It's what the frigate has been waiting for.
这就是军舰鸟一直等待的机会
No wonder the crew of the Essex called them the Man of War birds.
也难怪艾萨克斯号的船员称其为战士鸟
For two weeks, the frigate birds keep up their relentless aerial assault
两周以来，军舰鸟持续发动无情的空袭
until finally the sooty tern chicks are old enough to get away.
直到乌燕鸥雏鸟长大可以自行逃脱
Tropical islands are an obvious magnet for life.
热带岛屿吸引着众多的生灵
But things are just as busy underwater.
但是水面以下也同样热闹
Deep currents collide with these islands,
深海洋流拍击着这些岛屿
forcing small, but vital amounts of nutrients up from the depths.
使得少量至关重要的养分从海底深处上浮
At 50 metres deep, sea fans are amongst the first to benefit.
水深五十米处，柳珊瑚是最早的受益者之一。
