grass是不可数名词,没有复数形式。 grasses: 稻科植物类,禾本种。这是另外一个单词了,不是grass的复数形式。 例句: 1. if anyone grasses on us, his life won't be worth living! 谁要是出卖我们, 他就别想活了! 2. a small or reduced flower, especially one of the grasses and composite plants, such as a daisy. 小花尤指禾木植物或菊科植物的一朵小花或小花穗,例如雏菊花 3. any of several similar or related grasses. 与其相似或有关的一种禾草 4. the stiff stalk of various grasses. 梗草各种草的硬花梗