英语语法分析

Bruxism is a common oral parafunctional activity. It is generally defined as the activity of grinding or gnashing of the teeth at times other than during the mastication.

磨牙症是常见的口腔副功能活动，是指咀嚼食物以外的时段内，上下牙齿相互紧咬或磨动的现象。