Hello Evgeniy, They could be interchangeable yet : 美丽 měi​lì​ means only beautiful while 漂亮 piào​liang​ could mean both beautiful or pretty. So 漂亮 is more likely to refer to girl's and women beauty, while 美丽 includes also any beautiful thing, scenery etc...

美丽means,a person who has good appearance and good heart 漂亮just can describe a person that has good appearance.do you understand?

“美丽”可以表示一个人的心灵，也可以形容一个人的外表，而漂亮一般只形容一个人的外表。Did you understand ?

美丽 is kind ,,,漂亮is kind or not kind,,,,美丽is a very nice words

人不因漂亮而美丽，而因为美丽而漂亮。 If you know that,then you will get to know the differece between them.