他年轻时挥霍了许多金钱，现在深感后悔。

Tā niánqīng shí huīhuò le xǔduō jīnqián, xiànzài shēn gǎn hòuhuǐ.

When he was young, he squandered a lot of money and now deeply regrets it.

他挥霍了大量时间在无意义的娱乐活动上。

Tā huīhuò le dàliàng shíjiān zài wúyìyì de yúlè huódòng shàng.

He squandered a large amount of time on meaningless entertainment activities.

不要挥霍精力在琐碎的事情上，要集中精力做重要的事情。

Bùyào huīhuò jīnglì zài suǒsuì de shìqíng shàng, yào jízhōng jīnglì zuò zhòngyào de shìqíng.

Don't squander your energy on trivial matters; concentrate your energy on important things.