"he studied medicine at Harvard"
"you have to face the music" "take your medicine"
误 His father wanted him to study medicines but he took up law.
正 His father wanted him to study medicine but he took up law.
析medicine作“医学”解时是不可数名词,不用复数,而且往往不与冠词连用。
农民使用各种药物杀虫。误 Farmers use various medicines to kill insects.
正 Farmers use various chemicals to kill insects.
析medicine作“药物”解时,是针对人或动物的,针对昆虫或植物的药物用chemicals。