[口语]试图做不可能成功之事，白费气力，枉费心机；枉费心机，以头碰壁，试图干不可能实现的事 against a brick wall: 进度受阻one brick wall: 单砖墙one-and-half brick wall: 一砖半墙one-brick wall: 单砖墙；单砖厚墙runs head against a wall: 碰得头破血流下载手机词典可随时随地查词查翻译
