#每日單字

sound
(n.) 聲音
(adj.) 完好的；健康的；合理的、明智的

It's an old building but it's still structurally sound.
這是一座老建築物，但結構依然完好。

Considering his age, his body is surprisingly sound.
就年齡來說，他的身體異常健康。

She gave me some very sound advice.
她給了我一些非常好的建議。