Mucocellulose
粘液纤维素
🗣️ 情景例句
Where are you from?
你是从哪儿来的？
Who is this?I don't recognize your voice.
你是谁?我不认出你的声音。
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！