I don't know why he tested positive for drugs. The only explanation I can think of is that the samples got mixed up.我不知道他的药检为什么呈阳性,我能想到的唯一解释就是样本搞错了。When he left college he got mixed up with the wrong people.离开大学后,他结交了一些不三不四的人。Somewhere along the line he got mixed up in drugs.不知道何时他染上了毒品。I got mixed up and had to start over.我搞混了,只得重新开始。He got mixed up in a plan to destroy the government. 他被卷入一个破坏政府的计划。