Definition
To take necessary actions or verify to be certain that something will happen, is true, or is the case.
确保
Please make sure to check all the data before submitting the report.
请确保在提交报告前检查所有数据。
Make sure that all the lights are turned off before leaving the office.
离开办公室前，请确保所有灯都已关闭。
For your safety, please make sure that you have your seatbelt fastened while driving.
为了您的安全，请确保在驾驶时系好安全带。