1.prone to 易于；倾向于

As they shorten, cells become more prone to disease and death.

细胞变小后就会更容易感染疾病，也更容易死亡。

He's prone to flit between subjects with amazing ease.

他往往会轻松自如地转换话题。

2.step down 辞职；下台

The manager had to step down on account of poor health.

那位经理由于身体不好,只能辞职不干。

He has decided that he doesn't want to embarrass the movement and will therefore step down.

他已拿定主意：他不想令运动陷入困窘的境地，因此决心辞职。

3.economic crisis 经济危机；金融危机

Natural disasters have obvi-ously contributed to the continent's economic crisis.

很显然，自然灾害也是造成该大陆经济危机的原因之一。

The economic crisis was interpreted in diametrically opposing ways.

对于这场经济危机有着截然不同的解释。