Y. s.
[医] 黄斑(视网膜)
🧩 词语组成解析
基督教青年会
🗣️ 情景例句
I have received the secretarial training for six months.
我曾接受过6个月的秘书训练。
When did you call?
你什么时候打电话来的？
The doctor began to operate on the boy.
医生开始给那个男孩动手术。