矮平部位的网点吃亏是由于网点被网丝遮蔽和曝平时平线透过网点而变成的。

Hihglights part of the loss is due to net-point are Twine masking and exposure time line through the mesh point.

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当鱼不使用鱼鳍时，会将它们折叠起来，收回到特殊的沟槽或者凹陷部位；这样鱼鳍就可以与身体保持齐平，以维持它们平滑的外形。

When not in use, the fins are tucked into special grooves or depressions so that they lie flush with the body and do not break up its smooth contours.

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单分子车的旋转的部位实际上更像一个巨大的平扁的碟子。

The part of the molecule that rotates is actually much closer to a large, flat plate.

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