Tyrrellite
硒铜镍矿
🗣️ 情景例句
Have you ever held a secretarial position?
你曾当过秘书吗？
Will you take that library book back for me?
你能帮我把书还回图书馆吗？
What's the basis of your belief that the product is safe?
你凭什么相信产品是安全的？