So we should aim for a normal level rather than a very high one.

所以我们的目标应该是一个正常水平的含量而不是一个非常高的水平。

youdao

But when they were subjected to stress, the level of stress hormones remained high much longer than in normal mice.

但它们感受到了压力的时候，它们的应激激素会持续比正常小老鼠的要偏高并且持续更久些。

youdao

Even the normal shift workers have such a high skill level, it is not so easy to lay them off. You lose a lot of knowledge, which would give you big problems starting up again.

我们哪怕是最普通的倒班员工都有极高的技术水平，怎么舍得裁掉他们，否则，失去了技术知识，想要东山再起的时候就麻烦了，”他说。

youdao

He suggested the study could explain why there is a high level of normal-tension glaucoma in eastern Asia.

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