subtracted mean gray value 消减平均灰度
In finance and business services, where gross value added went up by 3.5% a year, MFP subtracted 1.3 points.
金融和商业服务业的总值上升至每年3.5%,而MFP则要减掉1.3个百分点。
The subtract operator, however, is not commutative; therefore, you need two operations to handle the value to be subtracted and the value from which the subtraction will take place.
但是,减法运算符是不可交换的;所以,需要两个操作来处理减数和被减数。
If val1 is a non-vector value, then val1 is replicated across a vector, and then val2 is subtracted from it.
如果val1是一个非向量值,就将该值在整个向量中复制,然后将val2从中减去。
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