Backup ring
[化] 垫圈
🧩 词语组成解析
backup
['bækˌʌp]
n. 支持，后援;阻塞;<计>备份文件;[乐]伴奏;
adj. 备用的，后补的;支持性的;伴奏的;
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
And thank Susan.
还要谢谢， Susan。
I apologize for that, sir.
请您原谅。
I was able to tell him that he had pulled out the wrong tooth.
我总算有可能告诉他，他拔错了牙。