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
She does the housework, is that right?
她专门干家务，对吗？
I'm afraid I spilled coffee on the tablecloth.
对不起，我把咖啡洒到桌布上了。
Where are you going?
你去哪儿？