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She carefully noted whether her math problems had pluses or minuses before she began her work.
她开始做题前,很细心地看题目数字前是正号还是负号.
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There are various pluses for us in going to this school-it's near our house, for one.
上这所学校对我们来说有很多好处 -- 离家近就是一点.
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采用PLC的高速计数器进行测量轮正转和反转时的脉冲信号的采集，通过进一步程序运算得到绝对位移量。
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