Lengebachite
[机] 叶硫砷银铅矿
🗣️ 情景例句
who have made my stay in the United States so wonderful.
是你们使得我在美国的生活如此多采多姿。
Every man is the son of his own works.
种瓜得瓜，种豆得豆。
Even more processes are never patented at all but kept as secret processes.
更多的工艺过程根本就不会取得专利权，而是作为秘方保存着。