Outdated 过期的，过时的

例句一：

Michael's beliefs are outdated. He still thinks women shouldn't be allowed out of the kitchen.

Michael的想法已经过时了，他还觉得女人应该待在厨房里呢。

例句二：

Email is outdated. Everyone just sends texts or uses a messaging app nowadays.

邮件已经过时了，现在每个人都是用发短信或者可以发信息的App。