Machine translation is an open problem while its evaluation is also very difficult.

机器翻译是项很困难的研究课题，而机器翻译评价也不是一件容易的事。

youdao

Machine translation is an open problem while its evaluation is also very difficult.

机器翻译是项很困难的研究课题，而机器翻译评价也不是一件容易的事。

youdao