复杂多变的国内经济环境的英文：
complicated and volatile economic environment both at home and abroad

complicated是什么意思：
adj. 结构复杂的

The sceptic knows that life is complicated.
怀疑论者却深知人生是如此错综复杂、扑朔迷离。

Involved or intricate, as in structure; complicated.
复杂的在结构中牵扯较多的或错综复杂的；复杂的

There is no need to complicate matters.
没有必要使问题复杂化。

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。

economic是什么意思：
adj. 经济上的；经济学的

an economical shopper;
精打细算的购物者;

economic planning
制订经济计划