相聚用英语怎么说

相聚：Get together，或者一个词“gather”
“a waste of time”是“浪费时间”的意思，例句：

Why are you still doing your homework? It's totally a waste of time.

get toghter
浪费时间

All get-together
a waste of time的意思是浪费时间..是一个短语咯

浪费时间

get toghter
meet

meet