《明史·志·卷七》
月亮的快慢是入转内的事，圭表测高下是入交内的事，岂容混合推算。
太阴迟疾是入转内事，表测高下是入交内事，岂容混推。
The speed of the moon is a matter of revolution, and the measurement of the height with a gnomon is a matter of intercourse. How can they be mixed and deduced?