But, that's not a part of the surface itself.
它不是这个曲面的一部分。
The surface itself is an equipotential.
表面本身是一等位面。
The earth's surface itself serves as the reference space.
地球表面即可视为基准空间。
You might almost as well be living outside, on the surface itself.
你还不如住在外面，住到地面上去呢。
You might almost as well be living outside, on the surface itself.
你还不如住在外面，住到地面上去呢。
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