Annulus
n. 环, 环形物, 体环\\n[化] 环形缝; 环隙
🏥 医学释义
环形物，环形套管
🗣️ 情景例句
Good morning. Would you please bring me some breakfast?
早上好，可否为我送点早餐？
Diligence is the mother of success.
勤奋是成功之母。
You've got it.
你明白了。