不要那样盯着人看，这样不礼貌。

Don't ___stare at people like that, it's rude.

他坐了几个小时，凝视着远方，思绪万千。

He sat for hours ___staring into the distance, lost in thought.

她在公园里专注地盯着他看。

She was ___staring at him intently in the park.