In the primary stage of their civilization, they had no metal tools.

在他们的文明最初阶段，他们没有金属工具。

youdao

In the primary stages of their civilization, they had no metal tools.

在他们文明的最初阶段没有金属工具。

youdao

In the primary stages of their civilization, they had no metal tools.

在他们文明的最初阶段没有金属工具。

youdao