Thank your stars he has the sense to act his age.

他这个年龄能做到这样已经很不错了。

A. Her inability to act her age.

A. 她无法表现出她的年龄。

Will you guys act your age? - - Hi, everybody. - Hey, Mom.

大家好 -妈妈麦姬，我没听见你关车门。

Now if you can't act your age then you shouldn't be here at all.

要是你们不能成熟点儿 那就干脆出去吧。

Of course, travel is fun -- relaxing with abandon, not acting our age, going for broke, joining the party.

当然，旅行很有趣——放纵地放松，不按年龄行事，不惜一切代价参加聚会。