起伏很大的的英文：
volatile
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。