我建议的成人剂量可以减半或减至四分之一。

The doses I suggested for adults could be halved or quartered.

《柯林斯英汉双解大词典》

第四个建议可能是关于什么的呢？

What is the fourth suggestion probably about?

youdao

采纳以上建议，你就不会再抱怨背部疼痛、四肢麻木或无力了。

Take the above advice, and you may not complain back pain, numbness or weakness in your arms and legs anymore.

youdao

And also I wanted to mention in terms of checking your Lewis structures, regardless of what they are, you should always go back and I had 10, and then count 2, 4, 6, 8, 10, because you always need to make sure you have the same number of valence electrons that you calculated in your actual structure.

我还想提一点关于检查,你的路易斯结构的建议，不管它们是什么，你总是应该回去检查一下,我有十个，然后数一数，二，四，六，八，十个，因为你总是需要确保实际价电子的数量,与你在结构中算出的数量相等。

麻省理工公开课 - 化学原理课程节选