One day, while I was waiting for my father, I saw a little boy, around two years old, running freely on the grass as his mother watched from a short distance.
一天，当我在等爸爸的时候，我看见一个大约两岁的小男孩在草地上自由地奔跑，他妈妈就在不远处看着。
2
She saw a glint of silver in the grass.
她看到草地上银光闪亮。
《牛津词典》
3
They never saw anything else than streets, houses and busy people; no grass, no fir-trees and no mountains.