secondary cause

例句：

1. 1.The accident was caused by a combination of factors, including the driver's distracted behavior and the poor weather conditions.
   这次事故是由多种因素引起的，包括司机分心的行为和恶劣的天气条件。
2. 2. The researcher found that the failure rate was significantly higher in the second-tier cities compared to thefirst-tier cities.
   研究人员发现，与一线城市相比，二线城市的失败率显著更高。
3. 3. The company decided to invest in renewable energy as a secondary cause to reduce its carbon footprint.
   该公司决定作为次要原因投资于可再生能源，以减少其碳足迹。