例句：
1. The grass had withered in the warm sun.
这些草在温暖的.阳光下枯死了。
2. There was a smell of trampled grass and earth.
有踩烂的青草与泥土的味道。
3. He lay back on the grass using his backpack as a pillow.
他用背袋当枕头仰卧在草地上。
4. With one accord they turned and walked back over the grass.
他们步调一致地转身走过草坪。