self-balancing system的用法和样例：
例句
- A null-balance system is provided by balancing the magnetic forces by electrostatic forces.
零位平衡系统是靠静电力来平衡磁力而造成的。 - A good balancing system also provides a very safe charging and discharging platform, which is critical when handling LiPo batteries.
一个良好的平衡系统还提供了一个非常安全的充放电平台，这是关键的时候处理脂电池。
