Chevkinite
硅钛酸铈钇矿
🗣️ 情景例句
Help yourself, please.
请随便。
All your life you make many friends.
一生能结交许多的朋友。
The winch was again put into operation and one of the men started up the truck.
绞盘机再次启动，一位工人发动了急修车的引擎。