material什么时候用单数,什么时候复数?
1个回答

名词 n.

1.材料,原料[C][U]

Wood and stone are the only raw materials on the island.

木材和石头是这个岛上仅有的原材料.

2.织物,料子[C][U]

3.素材;资料[U][(+for)]

4.工具,用具[P]

Your writing materials are in the top drawer of your desk.

你的书写文具在你书桌的最上面的抽屉里.