原文视听

Patagonia, Chile,
智利，巴塔哥尼亚
home to one of the most extraordinary of beetles.
孕育着最独树一格的甲虫
There are many kinds of beetles in the world,
世界上有许多不同的甲虫
but this one has some of the biggest jaws of all.
但这种甲虫长了数一数二的大颚
He is Darwin's beetle.
这是一只智利长牙锹形虫
He is on his way to the forest to look for a mate.
它正准备到森林里寻找配偶
Whether he gets one or not will depend on his strength...
至于能否如愿
and on the size of his jaws.
要看它的力气和它颚部的大小
He starts his search.
它开始寻寻觅觅
A female is likely to be on a tree trunk.
雌甲虫可能出现在树干上
But trees, in this part of the world are very tall.
不过这一带多半是参天巨木
His search could be a long one.
它可能要找上老半天
Unfortunately for him, she is 25 metres above him near the top.
它运气不好，雌甲虫在二十五公尺高处 就快到树梢了
She has more normal-sized jaws.
雌甲虫的颚部尺寸比较正常
But then she only needs them for feeding.
不过它的颚部只用来进食
But he needs immense jaws forfighting...
但雄甲虫需要极大的颚部来打架
..because there are other males around with the same mission.
因为附近还有其他雄甲虫 肩负着同样的任务

重点解释

He is on his way to the forest to look for a mate.它正准备到森林里寻找配偶

on one's way to去...的路上

I passed the store on my way to the library.

我在去图书馆的路上经过了那家商店。

I ran across Tom on my way to school.

在去学校的路上我碰到了汤姆。

look for寻找；寻求

He turned on the torch to look for his keys.

他打开了手电筒，寻找钥匙。

Whether he gets one or not will depend on his strength...and on the size of his jaws.至于能否如愿要看它的力气和它颚部的大小

whether or not是否

I am deliberating whether or not to buy a new car.

我在考虑是否要买一辆新汽车。

Whether or not he will stay, I really don't care.

他要留下来还是要走，我真的不在意。

depend on依赖；依靠；取决于

We depend on the radio for news.

我们靠收音机听新闻。

Children depend on their parents for food and clothing.

小孩依赖他们的父母供给衣食。