vain
/veɪn/
/veɪn/
释义
adjective无用的，徒劳的；枉然的；虚荣的，自负的；徒劳，枉然
英英释义
adjectivethat does not produce the result you want
adjectivetoo proud of what you can do or how you look
adjectivewithout success
场景例句
- They made a vain attempt to save his life.
- She’s too vain to wear glasses.
- I tried in vain to sleep.
词态变化
vain, vainer, vainest
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