Thing is that it's very difficult to classify.

问题是很难进行分类。

youdao

Thingamajig Something difficult to classify or whose name has been forgotten or is not known.

某人或某物不易分类的事物或名字被忘记或不知道的人。

youdao

Thingamajig Something difficult to classify or whose name has been forgotten or is not known.

某人或某物不易分类的事物或名字被忘记或不知道的人。

youdao