balance guard

例句：

1. 1. The balance guard is a crucial component of the armor system.
   平衡护盾是装甲系统的关键组成部分。
2. 2. The balance guard was designed to protect against enemy attacks.
   平衡护盾被设计用来抵御敌人的攻击。
3. 3.The balance guard was tested in various environments to ensure its effectiveness.
   平衡护盾在不同的环境中进行了测试，以确保其有效性。