surface ice

• 表冰

surface ice的用法和样例：

例句

1. The ship is nudging through the ice.
   船在冰中推进。
2. Matvey saws out a great piece of ice for a lectern.
   玛特威锯下一大块冰做读经台用。
3. Perhaps, he said, the martian methane is continually produced beneath the surface but only released when summer warming breaks an icy seal on the surface.
   穆马说，也许火星甲烷不断地产生于地面之下，但是只有当夏季的升温打开了表面上的一处冰封之后，甲烷才能冒出来。

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