Arrhenite
铍钽铌矿, 蚀变的褐钇铌矿
🗣️ 情景例句
I'm ready to check out now.
我准备好要结账。
You cannot sell the cow and sup the milk.
你不可能出售乳牛，同时又要喝牛奶。
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。