1. They were scratches left by the grinder?
    他们是研磨者所留下的痕迹.

2. The jocund crowd left the square only when the police came.
    欢乐的人群只有当警察来的时候才离开广场。

3. The ship left the island and headed for the mainland.
    轮船离开小岛向大陆开去。

4. The spiral nebulae were scratches left by the grinder.
    螺旋状的"星云"是研磨者所留下的痕迹.

5. The owner of the stolen car was himself remiss. He left the keys in the vehicle.
    被窃的车主自己不小心，因为他把钥匙留在车上。

6. There is a screwdriver left on the site.
    现场留有一把螺丝起子。

7. They left there securely.
    他们安全地离开了那儿.

8. There was clearly nothing left to do but drop herself onto the shabby little couch and weep.
    显然没有别的办法,她只好倒在那张破旧的长沙发椅上哭泣.

9. The ball swerved to the left.
    那球突然转向左方.

10. They yelled their good-byes as the bus left.
    汽车开动时，他们大喊再见。