Perbunan
n. 丁苯橡胶
🗣️ 情景例句
No. I have nothing to declare.
没有。我没有什么要申报的。
If we are bound to forgive an enemy we are not bound to trust him.
如果我们决定宽恕一个敌人，但决不能相信他。
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。