以下是類似 歷不明 的翻譯
- When you buy a smartphone online you should make sure it comes from a trusted source. If you buy a stolen smartphone you may get in trouble.
- If you buy a car of questionable origin you need to be careful.
來歷正當 來路不明 下落不明
英文翻譯 [ + ]
 of questionable origin We don't know...