Penfieldite
六方氯铅矿
🗣️ 情景例句
He studied harder to improve his English.
他更加努力提高英语水平。
Do you like sport?
你喜欢运动？
When Aunt Huang came back, I was so tired. In the evening Liu Ming came to see me.
当黄阿姨回来的时候，我累极了。晚上刘明来看我。