mix them up

基本解释

Therefore, you must be careful not to mix them up.
因此，必须注意不能将它们弄混。
Each day, you would choose one of the meals from each category (more from the snacks), or mix them up if you like.
每天，你需要从每类食物中选择一份（点心多选几份）食用，或者混在一起吃。
The car divided cities into work and home areas; wireless technology may mix them up again, with more people working in suburbs or living in city centres.
汽车将城市分为工作区和生活区；无线技术可能将之重新融合，会有更多的人工作在郊区或生活在市中心。

Do mix grass cuttings with other wastes to loosen them up.
You know from experience if you've ever mixed them to make salad dressing, they don't mix too well. And you may know that if you heat them up, they mix much better.
经验告诉我们,你无法把它们混合做成色拉酱调料，他们不会很好的混合，但是你也知道,如果我们把他们加热，就能够混合的更好。
麻省理工公开课 - 热力学与动力学课程节选

Feith: So, I mean, there have been some people who have kind of concocted a goulash of snippets about this team that was working on the terrorist interconnections and the Special Plans Office, and they mixed them up when there's no basis for the mix.
CENTERFORSECURITYPOLICY: DOD Briefing on Intelligence Matters
These have lower margins, so adding them to the product mix lowers the average margin, but revenues and operating profits—both up 12%—are growing nicely.
ECONOMIST: Retailing