n: 短语和例子an N girder N 字桁。 to the nth (power) 【数学】到 n 次(幂)；到极度,极端。1.【罗马数字】90〔N＝90000〕。2.【化学】＝nitrogen.3.＝North(ern)。N ＝nuclear 核的：N-waste 核废料。
己: Ⅰ代词(自己) oneself; one's own; personal 短语和例子坚持己见 stand to one's assert; hold on to one's own views; 舍己为公 make personal sacrifices for the public good; 引为己任 regard as one's (own) duty; 各抒己见。
