原文视听

And that is a harsh division,
这是一种很残忍的分化
because the sixty degrees that separate the steaming water
因为热腾腾的温泉 和冰天雪地间
from the freezing surroundings
六十度的差距
can make the difference between life and death.
有时是决定生死的关键
But by far the majority of primate species
但绝大多数的灵长类
live in warm tropical forests.
都住在温暖的热带森林里
Among them are the largest of all.
其中包括了体型最大的灵长类
Gorillas live in stable family groups
平地大猩猩的家族族群稳定
with just a single leader,
族群只有单一领袖
a silverback male.
一只银背公猩猩
This one, here in the Congo basin, is the guardian of his family
这只住在刚果盆地的银背公猩猩 守护着由五只母猩猩
which includes five females and their infants.
和它们的宝宝组成的家族

重点解释

because the sixty degrees that separate the steaming water from the freezing surroundings因为热腾腾的温泉和冰天雪地间六十度的差距

separate from分离

He found himself separated from his mates.

他发现自己与伙伴们分开了。

A gin is a machine to separate seeds from cotton.

轧棉机是把棉籽从棉花里分离出来的机器。

But by far the majority of primate species live in warm tropical forests.但绝大多数的灵长类都住在温暖的热带森林里

by far到目前为止；显然，明显地

She is the best by far/She is by far the best.

她显然是最好的。

It is quicker by far to go by train.

乘火车要快得多。

live in住进

He had to live in the shadow of his famous father.

他不得不在他那有名望的父亲的庇护下生活。

The herrings usually live in large shoals.

青鱼通常生活在大的浅水区。