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check out = examine
examples:
- The pilots always check out the instruments before the plane takes off.
- The police checked out the whole house of the suspect but they didn’t find anything.
- The police are checking out the woman now. They are checking out her story to see if she has been lying.
- Why are you having headaches all the time? You should go to a doctor and get yourself checked out.
- Always check your paper out before you give it to the teacher.
