Chalcophyllite
云母铜矿
🗣️ 情景例句
running for the school board.
竞选联合校董会董事。
I think she works much too hard.
我认为她未免太过辛劳了。
engineers may soon be free to let their imaginations soar without being penalized by expensive failures.
因此，工程技术人员可能很块就可充分发挥他们的想像力，而不会因失败而造成经济上的损失。