Hexadienoic acid
[化] 己二烯酸
🧩 词语组成解析
🗣️ 情景例句
you've included performing arts centers,
你拍了表演艺术中心，
How old do you have to be to vote in the national elections?
你要多大才能在大选中投票？
If only I could fly.
要是我能飞就好了。