他每天在图书馆阅读一个小时用英语可以说：
He reads in the pbrary for an hour every day.
He spends an hour reading in the pbrary every day.
这些句子来源于基本的英语语法和日常用语。
一些相关的英文例句及其中文翻译：
He has a daily routine of reading in the pbrary for an hour.
他有每天在图书馆阅读一小时的例行公事。
He makes it a point to read in the pbrary for an hour every day.
他坚持每天在图书馆阅读一小时。
He reads for an hour in the pbrary as part of his daily routine.
他每天的例行公事中有在图书馆阅读一小时的部分。