區別就是兩者意思是不一樣，具體的不同如下！
liquid soap中文意思是液體肥皂洗手液肥皂溶液
Effective liquid soap with fresh and cool foam leaves a pleasant smell.
hand soap中文意思是香皂
I soaped up with the liquid hand soap until I felt as glazed as a ham. "Stand back and spray me."
liquid soap: 液體肥皂或洗滌液，不是固體的。
hand soap: 固體的洗手皁、肥皂，但也可以是洗手液。
