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三是一个正数。用英语怎么说？

三是一个正数。

Three is a plus quantity.

相关词汇
three is plus quantity

three

num. 三，三个，第三（章，页等）；n. 三岁，三个人[东西]，三，三个；adj. 三的，三个的；

is

vt.& vi. 是（be的三单形式；n. 存在；

plus

prep. （表示运算）加，（表示包容）外加，[口语]和，（表示数目）在零（度）以上；n. 加号，[数学]正量，好处，附加物；adj. 加的，正的，附加的，比所示数量多的；

quantity

n. 量，数量，定量，大批，数目，[语音学、韵律学]音量（指元音或音节的长短）；
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你只管先往前走。我随后就来。
He who spares his rod hates his son, But he who loves him chastens him early.
24不忍用杖打儿子的,是恨恶他;疼爱儿子的, 趁早管教.
For further information, please contact 414 3925, extension 2253.
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He sat there while I made the case for his dismissal...
他坐在那儿，听我陈述解雇他的理由。
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撒切尔女男爵的主张在很多人看来是可信的。
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一份耕耘，一份收获。
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该法令迫使工会推迟罢工。
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即使在他有意显得很和气的时候, 他的目光也从不露笑意。
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绳索因拉得太紧而断了。