引擎现在运行得更平稳了。
The engine is ___running more smoothly now.
停车时请不要让引擎一直运转。
Please don't leave the engine ___running while the car is parked.
我们让主服务器持续运行,以确保我们的服务始终可用。
We keep the main server ___running continuously to ensure our services are always available.