slam dunk

1. N-COUNT If you say that something is a slam dunk, you mean that a success or victory will be easily achieved. 轻而易举的事[非正式] [usu sing: v-link 'a' N]

So it's an easy decision. It's a slam dunk. 所以说做这个决定很容易。这是件轻而易举的事情。

2. N-COUNT In basketball, a slam dunk is a shot in which a player jumps up and forces the ball through the basket. 扣篮

...a series of spectacular slam dunks. ...接二连三的漂亮扣篮。