每日商务英语 第613期:速成课

crash course -------- 速成课（非正式）

英文释义
(INFORMAL) A short but intensive period of training, usually providing only basic information.

例句
Before traveling abroad as a tourist, I try to take a crash course in the language of the country I will be visiting.
在去国外旅行之前，我想上个速成课，学习我要去的国家的语言。