illustrate和describe区别
illustratev.加插图于；给(书等)做图表；(用示例、图画等)说明；
describev.描述；形容；把…称为；做…运动
Several people described seeing strange lights in the sky.
好几个人都说看到天上出现了奇异光芒。
There is a range of programs on the market which may be described as design aids.
市场上有各种程序，可以称为设计辅助工具。
His lecture was illustrated with slides taken during the expedition.