adj. 1.徒然的，无益的，没效果的；愚蠢的；不足道的。 2.空的，空虚的；虚有其表的，表面好看的，虚饰的。 3.自夸的，自负的；爱虚荣的。 短语和例子 vain efforts 徒劳。 vain titles 空名，虚衔。 a vain attempt 妄想。 a vain man 虚荣心强的人。 be vain of 自夸，自以为…了不起 (She is vain of her voice. 她自以为她的嗓音了不起)。 in vain 1. 无益地，徒然 (We protested in vain. 我们白白抗议了。pass one's life in vain虚度一生)。 2. 轻忽地，轻慢地，亵渎地 (take sb.'s name in vain轻慢地提到某人的名字(尤指轻慢地谈到上帝))。
unproductive of success; "a fruitless search"; "futile years after her artistic peak"; "a sleeveless errand"; "a vain attempt" 同义词：bootless, fruitless, futile, sleeveless,
characteristic of false pride; having an exaggerated sense of self-importance; "a conceited fool"; "an attitude of self-conceited arrogance"; "an egotistical disregard of others"; "so swollen by victory that he was unfit for normal duty"; "growing ever more swollen-headed and arbitrary"; "vain about her clothes" 同义词：conceited, egotistic, egotistical, self-conceited, swollen, swollen-headed,
例句与用法
1.
I will lose no time in vain regret . 我不会在徒然的后悔中失去时间。
2.
The secretary was a vain and pompous man . 秘书是一个虚荣而自负的人。
3.
You might not appeal to her in vain . 您对她的呼吁不可能毫无作用。
4.
The world had made him extravagant and vain . 社会使他变得放荡与虚浮。
5.
Possibly i torture myself in vain ? 说不定我是在白白地折磨自己吧？
6.
He still reasoned with her, but in vain . 他仍在与她辩论，但是辩论也没用。
7.
They tried in vain to frighten him with threats . 他们百般恫吓，依然无效。
8.
These embraces were a vain pretence . 这类拥护完全是故作姿态。
9.
Like many plain women, she was vain . 象许多姿色平平的女人一样，她很自负。
10.
To this eleanor objected, but in vain . 对此爱莉娜曾加以推辞，但是没有用。
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