小学一学时四十五分钟。
In primary schools, a class hour has45 minutes ( or a period is45 minutes long).
花四十五元获得享受传统文化熏陶的机会（b约翰西蒙）
Could afford up to forty-five bucks a throw to wax sentimental over their heritage ( bJohn Simon)
对了，大伟，我要开外面那辆Petro Chem油车往西边走，大概四十五分钟的车程吧。
Well, Davy, I'm driving that Petro Chem tanker out there and I'm headed west in about forty-five minutes.
订购数量达到五百片的.话，RS-5的价格是四十五美元。
The price on the RS-five is forty-five U.S.dollars for quantities up to five hundred units.