much less: ad. 更不必说(何况)
造句:
1. He can hardly run a mile, much less the marathon.
他连一哩都跑不了，更不用说马拉松了。
2. She cannot buy daily necessities, much less luxuries.
她连生活必需品都不能买，更不用说奢侈品。
3. I guess there are much less people in the Arctic regions than here.
我想北极地区的人要比这里的少得多。
4. That father can't discipline himself, much less set a good example for his children to follow.
那位父亲不能以身作则，更不用说做孩子的榜样了。
5. She knows no English, much less German.
她不懂英语，更不用说德语了。
6. I didn't even see him, much less speak to him.
我见也没有见到他，更谈不上和他说话了。
7. She's very liberal with promises but much less so with money.
她轻诺而手紧.
8. I read much less now than I did at school.
我现在看书远比我上学时少.
参考资料：snxb