Her income was barely enough to maintain one child, let alone three.

她的收入养活一个孩子几乎都不够，更不用说三个了。

《牛津词典》

Let alone is one three years. Ten three year I can also wait.

别说是一个三年。十个三年我也会等。

youdao

Let alone is one three years. Ten three year I can also wait.

别说是一个三年。十个三年我也会等。

youdao