few是可數(shù)還是不可數(shù)

　　A few cars passed close by me.

　　幾輛車(chē)從我近旁駛過(guò)。

　　It's only a few steps further.

　　再走幾步就到了。

　　The letter came a few days ago.

　　這封信是幾天前寄來(lái)的。