His efforts were to no avail.他徒劳无功。We tried to keep him alive but to no avail.我们全力抢救他,但却徒劳无功.They tried artificial respiration but it was of no avail.他们试做人工呼吸,可是无效....
I also cast about for some means of warning him.我也想寻找些方法来警告他.She cast about for some excuse for refusing his proposal.她设法寻找拒绝他求婚的借口.The suspect cast about for some way of escaping from the police - car.嫌疑犯在寻求某种方法逃出警车....