in vain• If people don't learn from this, then his suffering and death were in vain.• It took a great deal of courage to admit that all her efforts had been in vain.• Police have spent hours searchingin vain for the missingteenager.• Workers tried in vain to keep the building from collapsing.• Doctors tried in vain to save him but he died just before dawn.
The young mother died in a vain attempt to save her drowning son.
那位年轻的母亲没能救起溺水的儿子,自己也淹死了。
4.vain threat/promise etcliteraryHARM/BE BAD FOR# a threat, promise etc that is not worrying because the person cannot do what they say they will 空洞的威胁/承诺等
—vainlyadverbadv
The instructor struggled vainly to open his parachute.
教官拼命想打开降落伞,但没有成功。
nCOLLOCATIONS – Meaning 3: a vain attempt, hope, or search fails to achieve the result you wanted
nouns
a vain attempt/bid/effort
People close their windows at night in a vain attempt to shut out the sound of gunfire.
a vain hope
Young men moved south in the vain hope of finding work.
a vain search
Mothers have been to every shop in town in a vain search for the toy.
Examples from the Corpus
vain• So look at your friends, see what they are a little vain about and then multiply by a factor of ten.• I remembered all my vain attempts to change his mind.• He stretched up his arms in a vaineffort to reach the top of the embankment.• I am vain enough to want to look good, but not to style my hair and paint my toenails.• Pollsters have searched in vain for pockets of disloyalty.• The vaingirl did a little dance in them, but when she tried to stop, the shoes kept on dancing.• She's a vain girl who is always thinking about her figure.• They are so vain in bed, much more vain than women.• Later, it tried in vain to conquer the whole of the subcontinent.