Eugensite
汞钯矿
🗣️ 情景例句
It's time we hired a secretary to answer the phones.
我们早就该请一个秘书接听电话了。
All your life you make many friends.
一生能结交许多的朋友。
You are walking too fast. I can't keep up with you.
你走得太快，我跟不上。