Valve clearance
[化] 阀余隙
🧩 词语组成解析
valve
[vælv]
n. 阀;真空管;（管乐器的）活栓;（心脏的）瓣膜;
vt. 装阀于;以活门调节;
🗣️ 情景例句
No thanks. Maybe some other time.
不用了，谢谢。也许下次吧。
If she could help you, she would help you.
如果她能帮你，她一定会的。[虚拟语气]
The search proved difficult, for the puma was often observed at one place in the morning and at another place twenty miles away in the evening.
事实上搜寻工作很困难，因为常常是早晨在甲地发现那只美洲狮，晚上却在20英里外的乙地发现它的踪迹。