down set
- 下部集合：在数学中，下部集合（向下闭合集合）是给定偏序集合 (X,≤) 的子集 Y，使得对于所有元素 x 和 y，如果 y 小于等于 x，并且 x 是 Y 的一个元素，则 y 也在 Y 中。
网络释义专业释义
set down 放下 ; 记下 ; 登记 ; 写下
set down effective laws 制定积极有效的法律 ; 建立有效的法律
mask drop down set 面罩释放装置
set down to 归于 ; 认为是由于
set-down device 放置器 ; 订妥装置
vacuum m printing-down set 真空晒版机
set down to write down 写下 ; 抄下 ; 记下
set down all items 记下所有项目
Set Down Your Glass 放下玻璃杯
双语例句原声例句权威例句
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The student let him down, opened the sack, and set him free.
书生放他下来，打开口袋，放了他。
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Copyrights are automatically granted to creators as soon as their creations are set down in permanent form.
只要创作者的创作被以永久的格式固定下来，版权就会被自动授予创作者。
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Be sure to write the goals down, perhaps tell others about your goals, and set a time frame for achieving the goals.
一定要把自己的目标写下来，还可以把目标告诉其他人，同时为达到目标设定一定的时间范围。
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And I believe him. Why,I have seen him set Dan'l Webster down here on this floor--Dan'l Webster was the name of the frog and sing out, "Flies,Dan'l,flies!"
VOA: special.2009.08.29
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The problems are set up so that, if you start down the right path, it should be pretty straight-forward to work it through If you start down a plausible but incorrect path, you can sometimes find yourself stuck in the weeds somewhere, and we want to bring you back in.
问题提出了，如果你从，一开始就走正确的道路，解决的途径,就一目了然了,如果你走上一条貌似正确但实际错误的道路，你会在某时某刻,发现自己陷入泥沼，于是我们就会把你拉回来。
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What that is, is an organ pipe of the type of organ that we have over in Woolsey Hall, thirty-two feet tall, this gigantic sound of down there so that's what he's trying to set up.
这是一种管风琴,梧希音乐厅就有,三十二英尺高,巨大浑厚的低音,正是施特劳斯努力展现的
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