So if it went up yesterday, it will more likely go up today, because I'm throwing in a positive number, otherwise a negative number.

所以如果它昨天涨了，那么它几天张的可能性也就比较大，因为我给它的是一个正值，否则就是一个负值。

麻省理工公开课 - 计算机科学及编程导论课程节选

No, we can't. Because if l equals 1, we can not have m sub l equal negative 2, right, because the magnetic quantum number only goes from negative l to positive l here.

不行，因为如果ｌ等于１,ｍｌ的值不可能等于－２，对吧，因为磁量子数的值,这时只能从－１到１

麻省理工公开课 - 化学原理课程节选

So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.

也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。

麻省理工公开课 - 热力学与动力学课程节选

It could be positive or negative or complex, but it's just an ordinary number.

它可以是正数,负数或者复数,但它仍然只是一个普通的数

耶鲁公开课 - 基础物理课程节选

No positive number, no negative number. That's a zero.

没有正数，没有负数，只是个零。

耶鲁公开课 - 死亡课程节选

If when x is low, y also tends to be low, then this will be negative number and so will this, so their product is positive.

如果x取值小,同时y值也小,这将是一个负值,这个也是负值,负负得正,结果是正值

耶鲁公开课 - 金融市场课程节选

Because we've got one q1 and then we're adding q2 over q1 to it, but we've got negative q2 is a positive number.

这是因为这里有个,然后加上了q2除以，但是我们知道负的q2是个正数。

麻省理工公开课 - 热力学与动力学课程节选