1.减去,扣除 (from)
1.to take a number or amount from another number or amount. The symbol for this is – and is called a minus sign
2.to take away a small part of something
1.She further subtracts 11 days from her longest cycle to find the last "unsafe" day of her present cycle.
进而用最长周期天数减去11，即为现在月经周期“不安全的”最后一天。
2.Subtractability How much one user's consumption of a good or service subtracts from the ability of others to consume the good or service.
指一个使用者对某一货物或劳务的消费导致其他人对该货物或劳务的消费的能力减少的量。
3.simple math skills game that adds, subtracts, multiplied and pides then checks the answer to see if it is correct.
这是一个简单的数学技巧游戏，能使用加法，减法，乘法和除法，然后检查结果是否正确。
4.When she subtracts his score from her score he ends up with a zero, and he is not a zero.
她将自己的分数减去他的分数，使他得到零，但他不是零。
5.She then subtracts 18 days from her shortest cycle to find the first "unsafe" day of her present cycle.
然后用最短周期的天数减18，即为现在月经周期“不安全的”第一天；
6.The U. S. Bureau of Economic Analysis tallies the money Americans have spent, adds exports and subtracts imports, then publishes a number.
美国政府经济局通过分析美国人的金钱支出记录，加上出口额再减掉进口额，然后公布一个数字。
7.He adds, subtracts, pides, he multiplies the possibilities, even the possibilities that come out of your pain.
他加减乘除，他乘大可能性，即使在痛苦中也充满可能。
8.Subroutine getTotalTime simply subtracts the time of the last keystroke (in milliseconds) from the time of the first keystroke.
子例程getTotalTime将用第一次击键时间减去最后一次击键时间（以毫秒为单位）。
9.He adds, he subtracts, he pides the difficulties, the problems, the pains, and others pick up part of it.
他加他减，他也除掉困难，问题痛苦和其他坏事。
10.The relative polarities of the two voltages will determine whether the offset voltage adds to or subtracts from the source voltage.
这两个电压的相对极性决定了偏置电压是加到源电压上去还是从源电压中减去。