檢視不足为外人道的原始碼

[[File:U=286704626,1362423035&fm=26&gp=0.jpg|缩略图|400px|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=不足为外人道&step_word=&hs=0&pn=3&spn=0&di=10670&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=286704626%2C1362423035&os=2223944930%2C2213257399&simid=3559345812%2C623028745&adpicid=0&lpn=0&ln=837&fr=&fmq=1585815633754_R&fm=result&ic=&s=undefined&hd=&latest=&copyright=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2Fwww.51wendang.com%2Fpic%2F0444f76ea966ae74d05464d6%2F10-810-jpg_6-1080-0-0-1080.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bc8ojg1wg2_z%26e3Bv54AzdH3F15vAzdH3Fa999u0mjwlmmwj091ac9m91mAzdH3F8a&gsm=4&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 原圖鏈接][http://www.51wendang.com/doc/0444f76ea966ae74d05464d6/10 来自无忧档案]]]
'''不足为外人道'''：不必跟外面的人说。现多用于要求别人不要把有关的事告诉其他的人。