external cause

例句：

1. 1. The decision was made based on external factors such as market trends and competitor actions.
   这个决定是基于市场趋势和竞争对手行动等外部因素做出的。
2. 2.The company's success is largely due to the external cause of a favorable economic environment.
   该公司的成功在很大程度上归功于有利的经济环境这一外部原因。
3. 3.The researcher identified several external causes that contributed to the decline in sales.
   研究员识别出几个导致销售额下降的外部原因。