纪录片《我们的地球》 第264期 壮丽山脉(09)

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。

1 scent   

n.气味，香味，香水，线索，嗅觉；v.嗅，发觉

参考例句：

• The air was filled with the scent of lilac.空气中弥漫着丁香花的芬芳。
• The flowers give off a heady scent at night.这些花晚上散发出醉人的芳香。

2 itches   

n.痒( itch的名词复数 )；渴望，热望v.发痒( itch的第三人称单数 )

参考例句：

• His wool shirt always itches him. 他的羊毛内衣总是使他发痒。 来自《现代汉英综合大词典》
• This wool shirt itches my back. 这件羊毛衫使我背上发痒。 来自《现代英汉综合大词典》

3 dens   

n.牙齿，齿状部分；兽窝( den的名词复数 )；窝点；休息室；书斋

参考例句：

• Female bears tend to line their dens with leaves or grass. 母熊往往会在洞穴里垫些树叶或草。 来自辞典例句
• In winter bears usually hibernate in their dens. 冬天熊通常在穴里冬眠。 来自辞典例句

4 hibernate   

v.冬眠，蛰伏

参考例句：

• Bears often hibernate in caves.熊常在山洞里冬眠。
• Some warm-blooded animals do not need to hibernate.一些温血动物不需要冬眠。