He made a snide comment about her weight.

他说了一句很刻薄的话评论她的体重。

They kept making snide remarks about each other.

他们不断地互相讽刺。

She couldn't tell if he was being snide, so she took the question straight.

她拿不准他是不是在讽刺她，便干脆按字面去理解这个问题。