The number of tractors in developed countries increased dramatically, especially in the United States.

拖拉机的使用量在发达国家有了显著提升，尤其是在美国。

youdao

The number of tractors in developed countries increased dramatically, especially in the United States.

拖拉机的使用量在发达国家有了显著提升，尤其是在美国。

youdao