lettuce的意思是莴苣。作为植物生菜来讲或者作为菜叶子来讲都是不可数的。作为生菜品种、种类来说是可数的。

扩展资料

例句：

His lettuces have gone to seed.

他种的莴苣已结籽。

Thee lettuces are growing.

莴苣在生长。

My lettuces have bolted.

我种的莴苣已经结子了。

The lettuces certainly were very fine.

那些莴苣菜无疑是非常好。