Definition
This idiom is used to warn someone that they will become uninteresting if they only work and never take time to relax.
劳逸结合，避免单调乏味。
I've been working non-stop lately, without any rest. I need to remember the saying 'all work and no play makes Jack a dull boy'.
我最近一直在不停地工作，没有休息。我需要记住这句俗语『只工作不玩耍，聪明孩子也变傻』。
He spends all day in the office, no wonder he looks so tired. Remember, 'all work and no play makes Jack a dull boy'.
他整天都在办公室，难怪他看起来这么累。记住，『只工作不玩耍，聪明孩子也变傻』。
I know you’re eager to finish this project, but don’t let yourself become all work and no play. Remember ‘all work and no play makes Jack a dull boy’.
我知道你急着完成这个项目，但不要让自己变成只工作不休息。记住『只工作不玩耍，聪明孩子也变傻』。