Proelastin
前弹性硬蛋白
🗣️ 情景例句
All I do is study and take exams.
我要接受所有的学习和考试。
I'm a graduate of Yale University, I have a Doctor of philosophy degree.
我是耶鲁大学的毕业生，我有哲学博士学位。
He has retired from political life and gone to live abroad!
他已经退出了政界去国外了！”