It won't work. 行不通的；2. Been working out? 最近健身了吧？3. Don't worry. It will work itself out. 别担心，船到桥头自然直。4. work like magic / work wonders 功效神奇，特别管用，The painkiller worked like magic. 这止疼药太灵了。5. work my ass/butt off to do sth. 努力做好某事；