secondary cause的用法和樣例：
例句
- Studies have reported that the primary cause of fragment loss is new dental trauma or the nonphysiological use of the restored tooth.
研究認為，牙碎片缺失的原發性原因是新近牙體創傷或對已修復牙齒施加非生理性作用力。 - Depth and particle size were primary and secondary environment variables that influence the community structure of brachyuran crabs in the present geographic region.
深度與沙粒粒徑大小，分別為影響調查區域內螃蟹群聚結構之主要與次要因素。
