"Coincidence" (巧合) 是指两件事情或情况在时间和空间上同时发生，但没有直接的联系或原因。这个词源自拉丁文 "coincidere"，意思是"同时发生"或"一致"。
例句：
It's a coincidence that we both decided to wear red today. (我们今天都决定穿红色是个巧合。)
It's no coincidence that the two events happened at the same time. (这两件事情同时发生并不是巧合。)
It was a coincidence that I ran into my old friend at the mall. (我在商场碰到我的老朋友是个巧合。)
例句：
It's a coincidence that we both decided to wear red today. (我们今天都决定穿红色是个巧合。)
It's no coincidence that the two events happened at the same time. (这两件事情同时发生并不是巧合。)
It was a coincidence that I ran into my old friend at the mall. (我在商场碰到我的老朋友是个巧合。)