Doeglic acid
[化] 十九碳烯酸\\n[医] 十九碳烯酸
🧩 词语组成解析
🗣️ 情景例句
It's mostly young people who take part.
参加活动的绝大多数是年青人。
What do you do for relaxation?
你做什么消遣？
If you think it is necessary.
如果你认为有这必要的话。