don't let it happen:別讓它發生。
She's promised not to let it happen
again.
她答應不讓這種事情再次發生。
Don't worry about it. We won't let it
happen again.
別擔心,我們不會允許它再發生的。
We won't let it happen that bus incidents recently.
我們不會允許晨近發生的公交車事件再發生了。
I will let you off this time. Do not let it
happen again.
這次我就饒了你,但下不為例。
Don't let it happen.
不要讓這種事情發生。