“落后于时代”的英文怎么说?

落后于时代 lag behind at times

fall behind the times

lag behind the times

落后于时代 behind the age/times

She was quite behind the age.
她完全落后于时代了。

Young men shouldn't be behind the times.
青年人不应落后于时代

I guess we're really behind the times.
我想我们确实是落后于时代了