If the engine （） for a long period， there will be a danger of frost.
举一反三
- A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
- It was not long before he realized the danger of the position.
- Guangzhou has a subtropical monsoon climate, with sufficient light and heat, warm and humid, long summer, short frost period, abundant rainfall, but obvious characteristics of dry and wet seasons. The zonal vegetation type is subtropical monsoon evergreen broad-leaved forest.
- A long period of on-the-job training will be provided.
- He launched into a long speech about the danger of taking drugs.