Johnstrupite
氟硅铈矿
🗣️ 情景例句
Can you do me a favor?
你能帮我个忙吗？
He who makes constant complaint gets little compassion.
经常诉苦抱怨，难以博得同情。
George showed me to the guestroom which, he said, was rarely used.
乔治把我领进客房，说这间很少使用。