keep a sharp eye on somebodyWATCHto watch someone very carefully, especially because you do not trust them 密切注意某人〔尤指因对其不信任〕 Keep a sharp eye on the kids at all times! 你要一直睁大眼睛看住这些孩子!
keep a sharp eye on somebody• I keep a sharp eye on him.• Security guards kept a sharp eye on Mattson as he walked through the store.• As a teen-ager, I kept a sharp eye on who was winning the prizes I wanted: Honor Roll.
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