难度大的文本标为正值，简单的文本标为负值。

Difficult texts record a positive score and simple ones score negative numbers.

《柯林斯英汉双解大词典》

那时正值人们的态度开始变化，许多新思想正在流行。

It was just when attitudes were really beginning to change and lots of new ideas were coming in.

《柯林斯英汉双解大词典》

当时意大利正值阳光最充沛的时节。

Italy was at its sunniest.

《牛津词典》

So do you think noble gases would have a high positive electron affinity, a low positive, or negative electron affinity?

那么，你认为稀有气体的电子亲和能,应该是一个高的正值，一个低的正值，还是一个负值？

麻省理工公开课 - 化学原理课程节选

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

It is of opposite charge and it exerts an influence, only that is minus to plus so that is going to give me a minus term here.

它具有相反的电性，所以它也会有影响，只有这个负值相对正值来说会起到减少的作用,所以这里将会引入一个负值的量。

麻省理工公开课 - 固态化学导论课程节选