Piston ring
[化] 活塞环; 涨圈
📖 牛津释义
piston ring
split metal ring that fits into a groove on the rim of a piston to make a gas-tight seal 活塞环.
🧩 词语组成解析
piston
['pɪstən]
n. <机>活塞;
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
Were you here last time on his birthday party?
上次你有没有参加他的生日舞会？
Are they all non-reserved seats?
他们全部不预订的吗？
Are they going to return soon?
他们很快就回来吗？