This encyclopedia is very useful, but I cannot afford it.

套百科全书特别实用，可我买不起。

youdao

I automatically say, "I cannot afford it," whether I can or not.

我会无意识的说：“我买不起”不管我是不是真的买不起。

youdao

Shi said he was not taking medication for his hepatitis B. "I cannot afford it. All my four siblings are infected by hepatitis B and one of them has died."

他没有服用治疗B肝的药物：「我付不起，我们四兄弟姐妹都得B肝，其中一人已经先走了。

youdao