Catecholborane
儿茶酚硼烷
🗣️ 情景例句
I'd like to be a member.
我想加入做为会员。
How did you decide that product was safe?
你怎样决定产品是安全的呢？
Who won the girls' 400 metres?
女子400米赛跑谁获胜？