它们通常大概每十年出现一次。

They typically appear about once in a decade.

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整个过程通常大概只有150毫秒，比一眨眼的时间的一半还要短。

The whole process generally takes some 150 milliseconds, or less than half the blink of an eye.

youdao

新的地区团体通常由大概三到五名核心和坚定的成员组成。

New neighbourhood organizations usually form around a core of three to five committed people.

youdao

And then our drop date is normally, I'm not exactly sure when, but it's actually probably in November,

然后退课的日子通常是，我不确定什么时候，不过其实大概是十一月，

对于返校日 - SpeakingMax英语口语达人

but normally, it's probably the same.

但是，通常，大概是一样的。

来自瑞典 - SpeakingMax英语口语达人