If the valves do not close fully the engine will not develop full power.

如果阀门不完全关闭，发动机将不能发挥全部动力。

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If the valves do not close fully the engine will not develop full power.

如果气门关闭不严，发动机就不能发挥出全部的功率。

youdao

If the valves do not close fully the engine will not develop full power.

如果气门关闭不严，发动机就不能发挥出全部的功率。

youdao