我无意中发现他染上了烟瘾的翻译：I couldn't help noticing he was infected with tobacco addiction 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

I accidentally discovered that he contracted a smoking

I couldn't help noticing he was infected with tobacco addiction

I discovered accidentally he caught the addiction or craving for tobacco

I accidentally discovered that he had contracted smoking addiction

I couldn't help noticing he was infected with tobacco addiction