英语语法分析

Both cabins will be constructed from wood, with sloping undersides as well as pitched roofs.

两个小屋都将用木头建造，有倾斜的底面和坡屋顶。

But Notz is less optimistic about Antarctic sea ice, its undersides heated by eddying Southern Ocean currents.

但是对于南极的冰盖，诺茨并不那么乐观，因为其下层正受到南大洋旋流的加温。

As well as needle-sharp claws, the undersides of the feet are covered with short, spine-like scales, which ensure a firm grasp.

同样它也是锋利的鹰爪，在鹰爪的下面有一个短而象倒刺一样的脚掌，以确保紧紧地抓住猎物。