vain

徒劳的；自负的；无结果的；无用的英释adjadjsomeone who is vain is too proud of their good looks, abilities, or position – used to show disapproval

1 in vain,徒然；无效

2 vain glory,虚荣

1 Men can be just as vain as women..男人有时会和女人一样虚荣。