在法律上，这种犯罪被称为“乘人之危，诈欺取财”。

In the law, this crime is called Non compos mentis lex talionis sic transit gloria mundi.

他突然对记者大发雷霆，称他们是一帮乘人之危的家伙。

He rounded on journalists, calling them 'a pack of vultures'.

劳动者以欺诈、胁迫的手段或者乘人之危，使用人单位在违背真实意思的情况下订立或者变更劳动合同的；

The employee forces the employer to conclude or alter the employment contract against the employer's true will by means of deception, coercion or taking advantage of the employer's difficulties;

当乔为他的妻子生病而忧虑得几乎神经错乱时，还为了点小缺点去找他的岔子，这是乘人之危进行打击。

It's hitting a man when he's down to find fault with Joe over every tiny little mistake when he is almost off his head with worry over his wife's illness.