大学英语： substance n. 物质;实质;大意;根据

They were trying to remove harmful substances from the soil.〔他们正设法去除土壤里的有害物质。〕

Ice， snow and water are the same substance in different forms.〔冰、雪、水是同一物质的三种不同形式。〕

What was the point of going to a lecture with little substance?〔去听一个没有什么内容的讲座有什么意义呢?〕

What he is saying in substance is that we should take effective measures to prevent pollution.〔他大体上说的是我们应该采取有效措施防止污染。〕

There was no substance in his complaints.〔他的抱怨没有道理。〕

3. slight adj. 轻微的;纤细的

Mother said she had a slight headache.〔妈妈说她有点头疼。〕

I didn't have the slightest idea about what had happened.〔我一点都不知道发生了什么事。〕

His chances of winning the election are very slight.〔他在选举中获胜的可能性极小。〕

He is too slight to play football.〔他太纤细，不能踢足球。〕