In fact, they were countries that we called "backward."

事实上，它们就是我们称之为“落后”的国家。

youdao

Both countries were backward, China even more so.

两个国家都落后，中国则更落后。

youdao

Domestic research in this aspect is still relatively backward to foreign countries.

相对国外来说，国内在这量子保密通信方面的研究还是比较落后。

youdao

Domestic research in this aspect is still relatively backward to foreign countries.

相对国外来说，国内在这量子保密通信方面的研究还是比较落后。

youdao