O ring
un. O形环；圆形截面密封圈\\n
🧩 词语组成解析
ring
[riŋ]
n. 戒指，指环;铃声，钟声;环形物;拳击场;
vt. 形成环状;环绕;使（例如铃）响;打电话给;
vi. 按铃，敲钟;回响;成环形;
🗣️ 情景例句
Keep the meter running.
继续打表吧。
You must be hungry. Shall we get something to eat?
你一定饿了，我们吃点东西好吗？
Thus the rods, by falling, and by the direction in which they fell,
木棒倒下的多少和倒下的方向