null point [数] 零点 ; 无效点
Null Point and Gain Adjustable 零点增益可调
optical null point 光学零点
real null point theorem 实零点定理
null point of a polynomial 多项式的零点
electric drift of null point 零点电漂移
precision null-point potentiometry 精密零点电位测定法
This routine initially checks to see if NULL manager entry point vector, mgr_epv, was passed.
这个例程首先检查传递的管理器入口点向量mgr_epv是否是NULL。
For those methods to accept no argument would require a null where point was specified.
对于不接受参数的方法，在指定point的地方需要一个null。
Also, many times member variables of a class that point to other classes simply need to be set to null at the appropriate time.
此外，您常常需要在适当的时候将指向其他类的类成员变量设置为null。
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