Undocumented
a. 无正式文件的, 无事实证明的
🗣️ 情景例句
I'll set up an appointment with the marketing people.
我会与行销部的人安排一次会谈。
Any deviation from the contract will be unfavorable.
任何违背合同之事都是不利的。
In spite of all that has been said, the tourists have been picking leaves and cutting their names on the tree-trunk.
尽管有上述种种说法，但游客们还是照常摘树叶和把他们的名字刻在树干上。