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
We had a cat when I was eight years old.
我八岁时养过一只猫。
The eyes of the nation are upon the government.
国民的目光都注视着政府。
We may go abroad. I'm not sure.
我们可能到国外去，但我不敢肯定。