Percylite
氯铜铅矿
🗣️ 情景例句
I do mean it.
我的确是说真的。
Don't forget bring it to him.
不要忘记带给他。
for fear the agents of other firms should be able to trace the kind of research they are likely to be undertaking.
他们生怕别的公司的情报人员据此摸到他们可能要从事的某项科研项目。