南极的冰层损失也近似，其损失主要来自脆弱的西部，那里处于水下山脉的顶部。
Antarctica is losing nearly as much, mostly from its vulnerable west side, which is perched on top of submerged mountains.
而海底地形主要由水下山脉与山谷组成。
The underwater terrain is rough with underwater mountains and valleys, the BEA has said.
虽然小贝主要是监督儿子布鲁克林和罗密欧的安全，但是当他们冲下山时，他还是忍不住加入了他们。
And while he was mainly there to supervise sons Brooklyn and Romeo as they careered down the hill, Beckham couldn't resist joining in himself.
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