1. 旁观

– I had to look on while my friend was promoted and I wasn’t.（我不得不看着我的朋友升职，而我却没有。）

– The crowd looked on as the actors performed their play.（观众们看着演员们表演戏剧。）

– The children looked on in awe as the magician performed his tricks.（孩子们带着敬畏地看着魔术师表演魔术。）

2. 看待

– She looks on her job as a way to support her family.（她把工作看作是养家糊口的一种方式。）

– Many people look on exercise as a way to improve their health.（许多人把锻炼看作是改善健康的一种方式。）

– He looks on his success as a result of hard work and perseverance.（他把成功看作是努力工作和坚持不懈的结果。）

来说，“look on”这个短语在英语中既可以表示旁观，也可以表示看待。具体用法取决于上下文，需要根据句子的整体意思来判断。