Polypetipe
缩多氨酸
🗣️ 情景例句
Oh, thanks. I'll be there. Where will it be?
哦，谢谢，我一定出席。在哪里举行。
Which one is cheaper?
哪一个是较便宜的？
I haven't heard from her for a long time.
我好久没有她的消息了。