informally

例句：

1. 1.They decided to meet informally at thepark.
   他们决定在公园非正式地见面。
2. 2.The meeting was held informally due tothe lack of official notice.
   由于没有正式通知，会议是非正式召开的。
3. 3. He prefers to work informally rather than inan office setting.
   他更喜欢非正式的工作方式，而不是办公室环境。