名詞 number one:

1. a reference to yourself or myself etc.; `take care of number one' means to put your own interests first
2. the first or highest in an ordering or series
   同義詞：first
3. the first element in a countable series
   同義詞：first, number 1

1. This company is number one in the oil business.
   這家公司在石油業(yè)中首屈一指。
2. You can depend on it that she'll always look after number one.
   她總是關(guān)心自身的利益，對(duì)這一點(diǎn)可以打包票。
3. The ordinal number matching the number one trillion in a series.
   第一萬億，第一兆可數(shù)數(shù)列中與一萬億相對(duì)應(yīng)的序數(shù)
4. Corresponding in order to the number one.
   第一位的按順序排在第一位的