| 1 | These are the diesel engines. | |
| 2 | Our factory has turned over to the making of diesel engines. | |
| 3 | We experimented with diesel engines to drive the pumps. | |
| 4 | Drawing on their practical experience, they designed an air-cooled diesel motor. | |
| 5 | "Diesel, what a strange name for a watch," I thought. |