in vain attempt to do是什么意思啊..

问题描述:

in vain attempt to do是什么意思啊..
in vain effortto do
和in the vain hope that 呢...

in vain attempt to do尝试做某事失败
in vain effort to do 努力做某事但还是失败
in the vain hope that 空想
in vain就是“徒然”“没有用”的意思