Translation of "documentary proof" into Chinese

Without documentary proof of their existence, the doors to health and education might remain closed.

没有文件证明他们的存在,保健和教育大门有可能继续对他们关闭。

For such people, to demand proof of nationality, particularly documentary proof, was clearly meaningless.

向这些人要求出示国籍证明,尤其是证明文件,显然是毫无意义的。