Four-strokes
(four-stroke 的复数) adj. 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;
n. 中风
🗣️ 情景例句
Please, sit down.
请坐。
Are there reserved seats on the train?
车上有预订座位吗？
They aren't very busy!
他们不很忙吧！