I won't cover all of these options and the corresponding methods here since many are fairly obtuse (they are used only in very unusual situations) and won't be needed in many of your applications.

我不想在这里讲述所有这些选项及相应方法，因为它们中的很多都不易被察觉(它们只在极罕见的情况下使用)，在很多应用中都不需要。

youdao

And that's a very easy thing to apply, and that allows you now in many cases, to find the moment of inertia in situations which are not very symmetric.

它很容易运用，可以运用于很多例子，为了得到，非完全对称情况下的，转动惯量。

youdao

Also, there are many situations where those formats change very frequently - based on the changes in the business needs of partners.

此外，还有很多情况下这些格式的变化非常频繁-因为变动是业务合作伙伴的需求。

youdao

The "When" pattern is very simple, but you can use it in so many situations.

When”句型非常简单，你可以在许多场合用到它。

When 课堂 - SpeakingMax英语口语达人