孩子的身上有没有发现不正常的伤痕?。

Were any unusual wounded marks visible on the child's body?

youdao

当在图表中发现不正常的现象时，我们可以设法从不同的方面来对它作出解释。

When we find abnormal phenomena in a chart, we can try to explain it from different aspects.

youdao

很明显，这种良性的、或者常见的错误并不是非常重要，但是它们使得要在所有这些干扰信息中发现不正常的错误变得更加困难。

Such benign or common errors are clearly not significant, but they make it more difficult to spot unusual errors among all the noise.

youdao

Because it was in the 1950's or so, maybe the late 1940's, that people started to discover lithium, even though it had no natural function, it did do something in our bodies.

因为在二十世纪五十年代左右，可能是四十年代末期，人们开始发现锂，尽管不参与人体的正常生理活动，但是它确实会对我们的身体产生影响。

麻省理工公开课 - 化学原理课程节选