1、upon的词典解释是：In addition to the uses shown below,upon is used in phrasal verbs such as ‘come upon’ and ‘look upon’, and after some other verbs such as ‘decide’ and ‘depend’.除下列用法外，upon 还可用于 come upon，look upon 等短语动词中，并可接在 decide，depend等动词之后。在…上If one thing isupon another, it is on it。2、upon的例句是用作介词(prep.)All our hopes rested upon this venture.我们所有的希望都寄托在这次冒险上了。3、upon的读音是英[ə'pɒn]；美[ə'pɑːn]。