退学英文译为"withdraw from school"或者"drop out of school"。

"Withdraw from school"这个短语的来源是用"withdraw"这个动词，意思是"退出，撤回"，加上"from school"，意思就是"从学校退出"。

"Drop out of school"这个短语的来源是用"drop out"这个短语，意思是"辍学"，加上"of school"，意思就是"辍学，退出学校"。

关于退学的原因，可以说是因为"economic reasons"，意思是"经济原因"。

例句：

I had to withdraw from school because of economic reasons. (因为经济原因，我不得不退学。)
He dropped out of school due to financial difficulties. (他由于财政困难而辍学。)