假正指的是这样的一个数据实例：我们创建的这个模型预测它应该是正的，但事实相反，实际值却是负的。

Basically, a false positive is a data instance where the model we've created predicts it should be positive, but instead, the actual value is negative.

youdao

宇宙是由能量构成的，能量分为正能量和负能量，两种能量的性质完全相反。

The universe is constituted by energy. Which is divided into positive energy and negative energy, but their nature is completely opposite.

youdao

宇宙是由能量构成的，能量分为正能量和负能量，两种能量的性质完全相反。

Which is divided into positive energy and negative energy, but their nature is completely opposite.

youdao

So, in contrast, if it has a low electronegativity, this then is going to be an electron donor.

那么，相反地，如果它的电负性很低，它将会是一个电子的施主。

麻省理工公开课 - 化学原理课程节选

So the minus vector is the same vector flipped over, pointing the opposite way.

因此负矢量即为同一矢量的翻转,指向相反的方向

耶鲁公开课 - 基础物理课程节选

sa So we have 1 s a, and we're drawing this as having a positive amplitude, but since we have destructive interference we're going to draw 1 s b as having the opposite sign, so we have a plus and a minus in terms of signs.

我们有，我们把这画成一个正的振幅，但因为我们是相消干涉,我们把1sb画成相反的符号，所以我们有一正一负两个符号。

麻省理工公开课 - 化学原理课程节选