smell可數嗎？

例句：

The smell of the sea took him back to his childhood.

大海的.氣味使他回想起孩提時代。

Can you smell something burning?

你有沒有聞到什麼東西燒焦了？

Smell is keener in dogs than in humans.

狗的嗅覺比人的嗅覺靈敏。