blankly
adv. 茫然地；毫无表情地；茫然若失
例句
She stared at him blankly.
她面无表情地盯着他。
《柯林斯英汉双解大词典》
Her eyes dulled and she gazed blankly.
她双目变得黯然无神，茫然凝神。
I stood there blankly, not knowing what to do.
我茫然地站在那里，不知道该怎么办。
