Annulus
n. 环, 环形物, 体环\\n[化] 环形缝; 环隙
🗣️ 情景例句
What about your arms? Lift your arms up like this.
你胳膊怎么样?手抬起来, 像这样。
Knowledge will not be aquired without pain and application.
不花力气,不下功夫是得不到知识的。
Great! Could you bring it to school tomorrow?
好极了!你明天能把它带到学校来吗?
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