她双目变得黯然无神，茫然凝神。
Her eyes dulled and she gazed blankly.
我茫然地看着面前这张纸。
I stared blankly at the paper in front of me.
他茫然地看了看她，好像不认识她似的。
He gave her a blank look, as if he had no idea who she was.
我茫然地站在那里，不知道该怎么办。
I stood there blankly, not knowing what to do.
我和你一样，和每个人一样，感到茫然困惑。
I am a human being at sea like you, like everyone.