First, my hygienist presented me with a causal chain that was hard to dispute. Bad brushing leads to loss of teeth. The only way out is to brush better.

• 首先，我的牙医提出了一套无可辩驳的因果链。不好好刷牙，就会导致牙齿坏掉。唯一的解决方法，就是好好刷牙。