a non-existent problem

不存在的问题

牛津词典

‘How's your social life? ’ ‘Non-existent, I'm afraid. ’

“你的社交生活如何？”“我恐怕没有社交生活。”

牛津词典

Hospital beds were scarce and medicines were practically non-existent .

当时医院病床紧缺，药物根本所剩无几。

牛津词典

Hygiene was non-existent: no running water, no bathroom...

卫生根本谈不上：没有自来水、没有卫生间。

柯林斯高阶英语词典

You'll take everything you're offered yet your own generosity is virtually non-existent.

你倒是来者不拒，照单全收，可你自己实际上却一毛不拔。

柯林斯高阶英语词典