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1·The birch tree has white bark, and this tough protective outer layer of the tree, this white bark, is waterproof.

桦树有白色的树皮，树上这个坚硬的保护外层，这个白色的树皮，是防水的。

2·Today such gravitational compensation probably would not occur: the outer layer of the Moon is too cold and stiff.

今天这种引力补偿很有可能不会发生：月球的外层过于寒冷和坚硬。

3·Often, you will only need this in the coldest weather, when the fleece adds extra insulation between your base layer and your outer layer.

通常你只会在最冷的天气才需要这个，羊毛会在你的底层和外套之间增加一个额外的隔绝层。

4·Glass can be used as the outer layer.

外层可以使用玻璃。

5·Top this with a waterproof, breathable outer layer.

在这一层之上，是防水透气的外层。

6·The cortex is the outer layer and the outer layer is all crumpled up.

大脑皮层是大脑的外层，上面布满了褶皱。

7·Their purpose is to remove the damaged outer layer of your skin.

它们的目的是消除损害外层你的皮肤。

8·Still in the running is a huge impact that blew away an outer layer of Mercury.

现在还有可能的假说指出是另外的一次大冲击毁坏了水星的外层结构。

9·Wear an outer layer of breathable, wind-resistant, water-resistant material.

穿一件抗风防水材料制成的透气的外套。

10·The outer layer of the cerebrum is called the cortex (also known as gray matter).

大脑外层叫做皮质(也称“灰质”)。