刚一到达前线，他们就开始研究防御工事。

On arriving at the front they began to study the defense works.

youdao

猫是被放在防御开始的时候。

These cats are the ones that were there in the first place.

youdao

这个包包含了基本的编辑器，开始建立自己的防御地图。

This pack contains the basic editor to start building your own Tower Defense maps.

youdao

这个包包含了基本的编辑器，开始建立自己的防御地图。

This pack contains the basic editor to start building your own Tower Defense maps.

youdao