Nitritocobalamin
(亚)硝(酸)钴胺素
🗣️ 情景例句
There's a conversation we have to finish.
我们有一段话还没有谈完呢。
I dropped the letter in the mailbox on the corner.
我把信放到角落上的邮箱里。
Where does Bill sit in the classrooom?
比尔坐在教室的那块儿？