在一个时期，表层和次表层的水流方向相反；表层水流向外海方向流动，靠近底层的水流则向陆地方向流动。

For a time, surface and subsurface current are in opposite directions; flow is seaward at the surface and landward near the bottom.

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在其底层，该接口是基于HTTP，并努力向RESTful靠近。

At the bottom level, the interface is based on HTTP and tries hard to be RESTful.

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然后开始进入或者尽可能靠近那个领域，即便要从底层做起。

Then start working in that field, or as close to it as you can get, even if you have to start at the bottom.

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