他不愿相信他的儿子沾染毒品。

He refused to believe (that) his son was involved in drugs.

《牛津词典》

如果你不抽烟也不沾染毒品，你可能认为自己没有坏习惯。

If you don't smoke or do drugs you may think you're clear of bad habits.

youdao

请你想象一下，那年他18岁，身处伦敦，穿着流行服饰，很讨女孩子喜爱，却从不沾染毒品。

Imagine him as an eighteen-year-old that year in london-wearing the right clothes, apparently popular with the ladies, but passing the bong without ever taking a hit.

youdao