Holtfreter
[人名] 霍尔特弗雷特
🗣️ 情景例句
He began to seek jobs in the classified advertisement column in the newspaper.
他开始从报纸的分类广告栏找工作。
The fire is the test of gold;adversity of strong man.
烈火试真金，困苦炼壮士。
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。