“正的”造句
如果倾斜方向相反的话, 它就是
正的了.
If the dip were in the opposite direction, it would be positive.
每个相角不论是
正的还是负的, 都是相对于水平轴来说的.
Each phase angle, whether positive or negative, is referenced to the horizontal.
方差的
正的平方根叫做标准差.
The positive square root of the variance is called the standard deviation.