pea可數(shù)還是不可數(shù)

　　例句：

　　The tumour had shrunk to the size of a pea.

　　腫瘤已縮小到豌豆大小。

　　Pea pods burst open when overripe.

　　豌豆過熟就會爆裂。

　　Each pea and peach on the beach can be reached by the peacock.

　　海灘上的每一顆豌豆和桃子孔雀都能觸及。