Pentamethyl
五甲基
🗣️ 情景例句
Ms Li, welcome on board.
李小姐，欢迎加入我们！
My grandparents live in the house next door.
我的祖父母住在隔壁的房子里。
If we could actually see the path described by a particle,such as a sand grain in the rock,
假如我们真能看到的运动轨迹，诸如岩石中一个沙粒分子