Epithioandrostanol
环硫雄醇
🗣️ 情景例句
This is no small accomplishment.
这是非同小可的成就。
A straw shows which way the wind blows.
一叶便知秋。
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。