Keratoelastin
鱼卵壳蛋白
🗣️ 情景例句
Away from the telephones and account books.
远离电话和帐簿。
She is hard to please.
她很难取悦。
A young man and a young woman were sitting behind me.
一青年男子与一青年女子坐在我的身后，