Keratoelastin
鱼卵壳蛋白
🗣️ 情景例句
Is this the bus that goes by the mall?
这班公共汽车经过商业街吗？
Why are you so lazy?
你为什么这样懒惰？
What about your sister Kate? You didn't come together, did you?
你的妹妹凯特呢？你们不是一起进校的，对不对？