vainly y徒劳地
vainly boast高傲地自吹自擂
try vainly徒劳地尝试
expect vainly白想
Vainly Attempt妄图
Vainly Scowling枉凝眉
hope vainly徒然希望
vainly hope梦想;妄想
profess vainly含糊地表白
"the city fathers tried vainly to find a solution"
同义词：in vain