原文视听

Each one, just seven centimetres long,
每一只小海龟都只有7厘米长
must make a hundred-metre sprint down the beach.
但他们得拿出百米冲刺的速度离开沙滩
From the moment they hatch,
从他们孵化出来那一刻
they're driven by an instinctive urge to run to the sea.
就受着本能的驱使爬向大海
Few creatures start life
很少有生物刚出生时
with the odds for success so heavily stacked against them.
就面临如此多的危险 挣扎求生
Yellow-billed kites.
黄嘴黑鸢
Pied crows.
非洲白颈鸦
But so many of these hatchlings appear together,
但是众多刚孵化的小海龟一起出现
that predators can't catch them all.
捕食者也不能将他们全部抓光

重点解释

they're driven by an instinctive urge to run to the sea.就受着本能的驱使爬向大海

urge to怂恿；激励

The urge to survive drove them on.

求生的欲望驱使他们继续努力。

She felt a deep urge to write about them.

她迫切想写他们的事迹。

predators can't catch them all.捕食者也不能将他们全部抓光

not all并不是所有的

I'm not all that keen on baseball.

我根本就不喜欢棒球。

Not all the shoes would pair up.

这些鞋子不全是能配成对的。