纪录片《我们的地球》 第264期 壮丽山脉(09)

（单词翻译）

There are now around 30 bears in this one valley.

这个山谷中大约有三十只熊。

As they rub, each leaves an individual and recognisable scent¹.

每只熊摩擦时都会留下易于辨认的独特气味。

So the tree soon carries a list of who's around,

所以树上很快会留有附近灰熊的气味，

which might help individuals to avoid a fight.

或许可以避免个体之间的争斗。

To best spread their scent, they really have to put their back into it.

为了更好地散布自己的气味，他们得用后背好好地蹭一蹭。

But summer is short. Itches² satisfactorily scratched, it's time to eat.

但是夏天很短暂。痒痒挠满意之后，是时候该进食了。

In a couple of months, they will have to return to their dens³ to hibernate⁴,

几个月后，他们就要回自己的窝里冬眠，

so now they must put on as much weight as they can.

所以现在必须尽可能地增重。

Winter in the mountains returns fast and hits hard.

山里的冬天来得迅猛。

Temperatures in the Rockies will drop to -54 degrees,

落基山脉地区的温度会降至零下54度，

so cold that moisture in the air freezes into tiny crystals called diamond dust.

以至于空气中的水分会直接凝结成冰晶，俗称钻石尘。