在古代用于抵抗外来入侵者的翻译：In ancient times for resistance to foreign invaders 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

For resistance to foreign invaders in ancient times

In ancient times for resistance to foreign invaders

Used in the ancient times resisting the external intruder

In ancient times used for resistance against foreign invaders

In ancient times for resistance to foreign invaders