这里是要牢记的五条实用建议。

Here are five practical Suggestions to keep in mind.

youdao

图3演示了需要牢记的一些重要元素。

Figure 3 illustrates some of the important elements to keep in mind.

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不过，这里还有一个必须被牢记的风险。

But there is another risk one must bear in mind.

youdao

But you actually need to keep a few caveats in mind as you do this, which is the fact that trends predict a lot of chemical properties, but they can't predict everything in terms of biological properties.

不过在你使用的过程中,需要牢记一些注意事项,那就是元素周期律可以预言很多化学性质，但是不能预言一切性质,比如生物学性质。

麻省理工公开课 - 化学原理课程节选

Another dimension to keep in mind throughout this discussion is the dimension of technology.

另外一个在讨论中,应该牢记的,研究教育的角度是技术。

麻省理工公开课 - 媒体、教育、市场课程节选

And an important thing to remember when we talk about resonance hybrids is that the structure it's not 1/2 the time this structure, and 1/2 of the time this structure, it's actually some combination or some average between the two structures.

而当我们讨论共振杂化的时候,有一件重要的事情需要牢记,那就是这种结构并不是,一半时间处于这种结构的状态，而另外一半时间又变成了这种结构的状态，它实际上是两种结构在,一定程度上的组合或者平均。

麻省理工公开课 - 化学原理课程节选