来路不明的英文：
unidentified

Bogey; bogie
来路不明的飞机

I own indeed I suspected when you showed me a sum of money that you had not come honestly by it
我该承认，你把那笔钱拿给我看的时候，我曾怀疑过它来路不明。

An unidentified flying object appeared on the radar screen.
一个不明飞行物出现在雷达萤幕上。

The Institute says that an unidentified virus is to blame for the syndrome.
该研究所表示，引起这种综合症的是一种尚未确认的病毒。

The previously unidentified objects have now been definitely ascertained as being satellites.
原来所说的不明飞行物现在已证实是卫星。

An unidentified plant mentioned in the Bible as the source of twigs used for sprinkling in certain Hebraic purificatory rites.
一种不知名的植物，在《圣经》中作为希伯来某些斋戒仪式中使用的树枝被提及

General Loss Reserve [IFC]: Loss Reserve set up to replace Unidentified Loss Reserve.
一般损失准备金[国际金融公司]:这项准备金的设立是用来代替