upon 核心词议：
prep. 在……上面
adv. 在上面地；此后
upon 基本解释
速记方法
速记技巧
词源记忆法
拆
1121年进入英语，直接源自古英语的uppan，意为在…上面；最初源自古北欧语的upp，意为向上。可以将其拆分为“up”和“on”两个部分。
记
其中“up”表示向上，而“on”表示在...之上。通过这种方式，我们可以更好地理解“upon”的含义，即“在...之上”。
知识扩展
习语积累
习语 prep. (almost) upon you 近在咫尺；即将来临 if sth in the future is almost upon you , it is going to arrive or happen very soon The summer season was almost upon them again. 转眼间他们又要过夏天了。 once upon a time （用于故事的开头）从前，很久以前 used, especially at the beginning of stories, to mean ‘a long time in the past’ Once upon a time there was a beautiful princess. 从前，有一位美丽的公主。
中文词源
中文词源：
upon 在上面
来自短语up on.
upon
精选例句
1、 Appear on the student's report upon completion.
完成学业后出现在学生的报告上。[机器自动翻译，如有错误，感谢纠错]
2、 Based upon their expressed thoughts and actual "musicking" behaviours, this text examines the songs they sing, the rhythms....
基于他们表达的思想和实际的“音乐”行为，本文研究了他们唱的歌，节奏....[机器自动翻译，如有错误，感谢纠错]
1、 Moreover, students should be prepared not just for their first job, but for their 4th and 5th jobs, as there’s little reason to doubt that people entering the workforce today will be called upon to play many different roles over the course of their careers.
此外，学生们不仅应该为他们的第一份工作做好准备，还应该为他们的第四份和第五份工作做好准备，因为毫无疑问，今天进入劳动力市场的人们将在他们的职业生涯中扮演许多不同的角色。
1、 They are subject to climatic occurrences such as weather systems, which impact upon hemispheres as a whole, and from continent to continent.
它们受到诸如天气系统等气候事件的影响，这些气候事件影响整个半球，并从一个大陆影响到另一个大陆。
1、 (48) But the force of geographic conditions peculiar to America, the interplay of the varied national groups upon one another, and the sheer difficulty of maintaining old-world ways in a raw, new continent caused significant changes.
但是，受美囯特有地理条件的影响、不同民族间的相互影响以及在这片荒蛮的新大陆上维持旧秩序的万分艰难，给这片新大陆带来了巨大的变化。
常见考点例句：
- Indeed , upon what grounds would gates sue ?
- 实际上，盖茨能够根据什么理由提起诉讼呢？
- Anything you decide will , of course , be personal and will depend upon your interests , needs , and expectations about research .
- 当然，你决定的任何东西将是你自己的事情，并且会根据你的兴趣，需要，和对研究的期望。
- Let those who wish to turn their backs upon the world .
- 有些人愿意对着世界转过背去，那就由他们吧。
- Urban planners continue to believe they can restrain suburbia and improve upon it .
- 城市规划者仍旧相信他能够抑制郊区，并依靠它提高自身水平。
- In our example above , the european central bank ( ecb ) , upon hearing the fed 's announcement , could make a similar pledge to debase the euro .
- 在我们上面的例子里，欧洲央行（ecb）根据得到的美联储的消息，会做一个类似的拉低欧元价格的决定。