45分钟用英语表达是：forty-five minutes；
forty-five：n.四十五，每分钟45次转速的唱片；45口径的***。
minutes：
（图片来自网络侵删）
n. 分钟; 分; 一会儿; 一会儿的工夫; 时刻。
v. 将(某事)写进会议记录。
minute的第三人称单数和复数。
相关介绍She kept me talking for forty-five minutes.
她让我一连说了45分钟。
She found that they spent ten hours and forty-five minutes if you counted each device individually.
她发现，如果每个媒体单独计算，青少年的使用时间是10小时45分钟。
Bake it forty-five minutes at three sixty.
在三百六十度的温度下烤四十五分钟。
Now heat the dye for about forty-five minutes or until the wool is the desired color.
此时继续加热大约45分钟，直到羊毛变成理想的颜色。
After about forty-five minutes of planting, some ideas started to come to me and back I went to the writing project.
大约过了55分钟种植后，开始涌现某些想法，于是我又重新回到写作上面。
