The baby can't even sit up yet, let alone walk!

这个婴儿连坐都坐不稳，更不用说走路了。

youdao

(let alone) The baby can't even crawl yet, let alone walk.

这个婴儿还不会爬(crawl)，更不要说走了。

youdao

After turning around a lot with your eyes closing, you can hardly stand still, let alone walk straight.

当你的眼睛闭上后旋转几圈，你几乎站立不住，更不必说笔直的站立了。

youdao

The agony was so bad he couldn't step out of bed, let alone walk, without downing painkillers.

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' The couple hand over the money and walk towards the bar, looking as if they'll never speak again, let alone tonight.

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