1、The strange creature was completely unidentifiable; no one had ever seen anything like it before.
这个奇怪的生物完全无法辨认,以前没有人见过这样的东西。
2、The fingerprints found at the crime scene were unidentifiable, making it difficult for the investigators to determine the culprit.
在犯罪现场发现的指纹无法识别,使得调查人员难以确定肇事者的身份。