Instead of erecting a single barrier, they now set up several lower defences that reduce rust's harm.

他们不是架设一个单独的障碍，而是设置几个低级别的防御，来减少锈病的危害。

youdao

Instead of erecting a single barrier, they now set up several lower defences that reduce rust's harm.

他们不是架设一个单独的障碍，而是设置几个低级别的防御，来减少锈病的危害。

youdao