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
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