Her strange behavior condemned her.

她古怪的行为使她自食其果。

Can you explain her strange behavior?

您能解释她的奇怪行为吗？

His strange behavior upset his father.

他的奇怪行为使他父亲很伤心。

I keep puzzling over his strange behavior.

我一直在苦苦思索他那奇怪的举止。

That will account for his strange behavior.

这可以说明他为什么有这样奇特的行为。