coincidence arrangement

例句：

1. 1. The two events were so coincidental that they seemed to have been planned together.
   这两件事如此巧合，似乎都是事先计划好的。
2. 2.The meeting was a coincidence; we both arrived at the same time.
   这次会议是巧合，我们都在同一时间到达。
3. 3. The researchers found that the occurrence of the disease coincided withcertain environmental factors.
   研究人员发现这种疾病的发生与某些环境因素有关。