在总结失败经验的基础上，再次手动注油时，打开排气阀，以推进腔排出冲程压力稳定为充满的标志。

In summing up the experience of failure on the basis of the oil when the manual again, open the exhaust valve to promote the stroke from the pressure chamber filled with a symbol of stability.

youdao

随着活塞现在位于下止点且所有气体已经燃烧，重要的是要在工作循环的第四个即最后一个冲程中将所有的已燃废气从气缸中排出。

With the piston now at BDC and all the gases having been burnt, it is important to remove all the burnt gases from the cylinder on the fourth and final stroke of the cycle of operations.

youdao

作功冲程耗尽了所有的气体，这样就必须采取相应的措施排出废气以及向气缸内再充入新鲜的可燃混合气：气体的运动由气门来控。

The power stroke "uses up" the gas, so means must be provided to expel the burnt gas and recharge the cylinder with a fresh petrol-air mixture: this control of gas movement is the duty of the valves;

youdao