Four-stroke
a. 四冲程的（内燃机）; 四行程
🧩 词语组成解析
four
[fɔr]
num. 四;四个;第四;
n. 四的;四个一组之物;
stroke
[strok]
n. 一击;击球;划水动作;中风;
vt. 划掉;轻抚;轻触;敲击;
vi. 击球;作尾桨手，指挥划桨;
🗣️ 情景例句
Easy now. Easy does it. That's it.
放轻 ，不要紧 ，对了。
Don't forget to invite him.
不要忘记邀请他。
If explosives are used, vibrations will cause the roof of the mine to collapse.
如果用炸药爆破，震动会引起矿顶塌落。