某人在某事上花费用的英语是 "incur expenses on something".
这个短语来源于动词 "incur" 和名词 "expenses". "Incur" 意思是遭受，承受，承担；"expenses" 意思是花费，开支。
例句：
The company incurred significant expenses on research and development.
公司在研发上花费了巨额资金。
He incurred expenses on travel for business purposes.
他为了商务旅行而花费了钱。
She incurred expenses on her daughter's education.
她为女儿的教育花费了钱。