Instead of doing his homework, he wasted time playing PC games.

意思是“他不好好做作业，而是把时间浪费在玩电脑游戏上”；

youdao

He wasted no time with social niceties.

他没有在社交礼仪上浪费一点点时间。

《柯林斯英汉双解大词典》

He must have thought Jane was worth it or he wouldn't have wasted time on her, I suppose.

我想，他当时肯定认为简值得他费心思，否则他就不会在她身上浪费时间了。

《柯林斯英汉双解大词典》

Grant wasted no time. He quickly sent troops to fight the Confederate force blocking the Tennessee River.

VOA: special.2009.11.26

Wilson wasted no time. He immediately called a special session of Congress to act on Democratic campaign promises to reduce import taxes,or tariffs.

VOA: special.2010.09.23

Prosecutor Alan Tieger wasted no time, dramatically launching into the case he intends to present.

VOA: standard.2009.10.27

He wasted no time eliminating thousands of jobs and brutally terminating unprofitable routes.

FORBES: Magazine Article

He wasted no time posting his discovery, with an instructional video, online.

FORBES: Crowd Control

Mussolini was notorious for his winning ways with women, though, as a mistress of his lamented, he never wasted time taking his pants off.

NEWYORKER: Booted