Act your age, not your shoe size.

按照你的年龄做事，不要按你的鞋号做事。

"No one says anymore," Act your age.

不会有人再说：“做与年纪相符的事情。”

Don’t look your age, but act your age.

举止与年龄相符。 不是让你看起来老成，而是做事要成熟。

Parents might tell teenagers, "Act your age."

家长们可能告诉年轻人， "在你的年龄做你该做的事" 。

If you can't act your age, you shouldn't be here at all.

如果你们不能表现得像个大人，你们根本就不应该在这。