Metacetaldehyde
[化] 变乙醛; 聚乙醛
🗣️ 情景例句
parents are invited to attend--
家长被邀请来参加
Send a postcard to me when you arrive in Shanghai.
你到上海以后给我发张明信片。
Then for a period of several weeks we practise doing the play.
随后几个星期我们进行排练。