Fluorite
n. 萤石\\n[化] 萤石
✅ 同义词
🗣️ 情景例句
At four o'clock,
四点钟，
Tell me where I can post them.
请问，哪里有投信的邮筒？
And he promptly handed the sheet of paper to the gaoler.
说完，他一下子把信递给狱卒。