比較句式系列8: much less

=not to mention

She cannot buy daily necessities, much less luxuries.
她連生活必需品都不能買，更不用說奢侈品。

The baby can't even walk, much less run.
这婴儿连走都不会, 更不用说跑了。

I know no English, much less French.
我不懂英语, 法语就更不懂了。