1、45的英语是forty-five。音标：英[f?:t?fa?v]、美[f?t?fa?v]。

2、例句：

I dare you to sit through forty-five minutes with someone like Vincent!我想你绝不敢和文森特这样的人一起坐上45分钟！

On the foreign exchanges,the US dollar is up point forty-five.在外汇交易中，美元上涨了0.45个百分点。