哈米吉多顿只发生一次，你知道的。

Armageddon only happens once, you know.

youdao

这个事件对于数据集合的每一行都只发生一次。

This event happens once for each row on the data set.

youdao

这些事件并不会只发生一次，但是它们并不频繁。

These events will not be one-time only occurrences, but they will be infrequent.

youdao

For example, the stock market crash of 1929 is repeatedly re-expected even though it only happened once; it's just prominent in our thinking.

929年股市崩盘,就被反复提及,尽管这只发生过一次,但是人们对它影响深刻

耶鲁公开课 - 金融市场课程节选