如何用'crash'表示速成班、一败涂地和不速之客？一起来学习下面三个短语。

'crash course' 指的是短期密集培训的速成班：

'She took a crash course in Italian before her holiday to Venice.'（她去威尼斯度假前上了意大利语的速成班。）

'crash and burn' 指的是以一种壮观的方式失败：

'They were only open for three months before the business crashed and burned.'（他们只开业了三个月就彻底失败了。）

'gatecrash a party' 指的是在没有请柬的情况下擅自闯入一个聚会：

'So many people gatecrashed our party that we ran out of food.' （这么多不速之客闯入我们的聚会，以至于我们吃的东西都不够了。）