The low speed bottom sweep provides proper heat transfer to tank walls.

低速底部可以将适当的热量转移到罐壁。

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So as we sweep top left to bottom right, we see the younger generation who is more likely to write blogs and upload videos to YouTube, to an older crowd who are more likely to be content consumers.

从图中左上到右下的趋势，我们可以看出，年轻人更喜欢写博客和上传视频到YouTube，而年长的人更愿意阅读网上的内容。

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To search or sweep the bottom body of water, as with a grappling hook or dragnet.

搜寻用抓钩或拖网在水底进行搜寻或打捞。

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