Alkylamine
烷基胺
🗣️ 情景例句
We usually ship the goods by regular liners.
我们一般是定期班轮装运货物。
Life without friend is death.
没有朋友的生活便等于死亡。
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。