a waste of time为什么用a
a waste of time是固定搭配,a是修饰waste的;表示浪费时间的意思;
例句
In my view it was a waste of time.
依我看,这是浪费时间。
Its a waste of time and energy.
那是浪费时间和精力。
\'It\'s a waste of time,\' he concluded
“这是浪费时间。”他总结道。
Personally I think it\'s a waste of time
在我看来,这是浪费时间。
It\'s a waste of time to concern yourself over other people\'s troubles.
为别人的麻烦事操心,纯粹是浪费时间。