一个也是一个

one to one───一对一，一个对一个

one on one───一对一

one by one───一个接一个

one-to-one───一对一，一个对一个

off on one───关上一个

on day one───在第一天

one-on-one───一对一

Its rival India has long had one. Thailand has one too. Japan, another rival, has a carrier for helicopters that could be adapted for fighters.───它的竞争对手印度早有一艘。泰国也有一艘。另一个竞争对手日本也有一艘可搭载直升机的航母，可改装用于战斗机。

Mother," said the little daughter again, "may not brother have one too?"───妈妈，”小女儿又说，“哥哥也可以吃一个吗？”

I told her that I'd just written a book, and that I hoped she'd write one too one day.───我告诉她我刚写了本书，而且我希望她有一天也能写本。