upper level

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upper level的英文翻译是什么意思，词典释义与在线翻译：

英英释义

形容词 upper-level:

1. at an elevated level in rank or importance

upper level的用法和样例：

例句

1. "A science fiction cannot not be regarded as a mere entertainment, but in fact it tells the reader much more."
   "科幻小说不能简单地看成是供消遣的，而实际上它给读者展示更深刻的内容。"
2. An electron can drop from a higher level to a lower one with the emission of a packet of electromagnetic radiation.
   利用电磁辐射束的辐射，能使电子从高能级落到低能级。