Lemma
n. 辅助定理, 论点, 引理\\n[医] 膜, 衣
✅ 同义词
🗣️ 情景例句
Thanks a lot.
非常感谢。
Please sign.
请你签字。
Just now we all watched you sign to show that you had received the cheque.
刚才我们大家都观察到了你为表明已收到那张支票而签名。