Maximum permissible concentration (mpc)
[化] 最大允许浓度
🧩 词语组成解析
🗣️ 情景例句
while you're at work.
在你工作的时候。
I forgot what I was gonna say.
我忘了要说什么了。
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。