In the future, we will require background checks on airport employees.今后，我们会要求对机场职员进行背景审查。A background check is normally a preliminary to a presidential appointment.任命总统前通常要进行背景审查。They ran a background check to make sure the job candidate had no criminal record.他们对求职者进行了背景审查，确保其没有犯罪记录。