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例子
The mistrustful neighbor kept a watchful eye on any new developments in the community.
From its perch high in the trees, the cougar observed the activity below with a watchful gaze.
The stage manager kept a watchful eye on the backstage chaos, ensuring everything ran smoothly behind the scenes.
The babysitter left the children to their games in the backyard, keeping a watchful eye from a distance.
The constable patrolled the streets diligently, keeping a watchful eye on the neighborhood.
