起伏很大的的英文：
volatile

volatile是什么意思：
adj. 易变的，反覆无常的；挥发性的；爆炸性的

Petrol is a volatile substance.
汽油是挥发性物质。

He has a volatile temper.
他脾气反复无常。

It is dispersed either by thermal volatilization or as a dust.
它用加热蒸发或粉尘的方式散发。

The poet is highly nervous and volatile in temperament.
诗人生性神经过敏，喜怒无常。

Volatility is the order of the day in the stock market.
上下浮动是股票市场整天的特点。