Piston ring
[化] 活塞環; 漲圈
?? 牛津釋義
piston ring
split metal ring that fits into a groove on the rim of a piston to make a gas-tight seal 活塞環.
?? 詞語組成解析
piston
['p?st?n]
n. <機>活塞;
ring
[ri?]
n. 戒指，指環;鈴聲，鐘聲;環形物;拳擊場;
vt. 形成環狀;環繞;使（例如鈴）響;打電話給;
vi. 按鈴，敲鐘;回響;成環形;
??? 情景例句
Take care, and have a nice flight.
請保重！祝你一路順風！
Great minds think alike.
英雄所見略同。
so she went to fetch the porter from his basement.
于是她到地下室去找看門的人。