我认为后见之明是一种无用的工具。

Hindsight, I think, is a useless tool.

youdao

珍道具是日语中解释”非无用创意“的一个词汇，字面上的意思是”怪异的工具“。

Chindogu is the Japanese term for "un-useless" ideas (it literallymeans "weird tool").

youdao

此工具并无损jpeg操作如旋转，并也可用于以优化和从您的图像中删除批注和其它无用的信息(例如，EXIF信息)。

This tool does lossless JPEG operations such as rotation and can also be used to optimize and remove comments and other useless information (such as EXIF information) from your images.

youdao