bottom surface

常见例句

So, that means you have to figure out what's the bottom surface of your solid, and what's the top surface of your solid?
这意味着你必须指出,立体图形的底部的曲面，和立体图形的顶部曲面？
If they hit the bottom surface before passing through, they are reflected off and absorbed at the top - and thus are not detected at the other end of the plates.
如果没有穿过之前，中子就掉落到底板，那么它们会反弹到顶板，并被吸收——这样就不会在发射另一端检测到。
But this bottom surface here is four times 1/4 than this surface area here, the flat part.
仅仅是面积,侧面积是底面积的。

On the bottom side, the notebook is sealed in such a way that you can't easily get at the battery, SSD or RAM. (This is pretty typical for Ultrabooks.) That bottom surface is also where you'll find the speaker strip, which is somewhat unusual: laptop speakers are usually located in the keyboard area or around the sides.
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Most models set up to try to figure out what happened during the Late Cretaceous climate changes conclude that water sank from the surface to the bottom of the ocean around Antarctica or the North Pacific.
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Its wedge shape design aids venting, and its bottom feet provide stability on any surface.
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