boat是可數(shù)名詞還是不可數(shù)名詞

　　例句：

　　His eye lit upon a small boat on the horizon.

　　他無意中看見地平線上有一條小船。

　　The boat was going under fast.

　　小船正迅速下沉。

　　He had a new car and a boat.

　　他有一輛新車和一條船。