今天我们要学的词是 substitute。Substitute 名词，是替代，替补的意思。A substitute teacher is heir to a trove of gold coins worth more than $7 million. 一名代课老师继承了很多珍贵的金币，价值七百多万美元。Across the country, a lot of people are using a drug called Spice as substitute for marijuana. 美国各地有不少人吸食一种叫Spice的毒品，做为大麻的替代品。Pure maple syrup is the perfect sugar substitute in a variety of dishes, including desserts and baked food. 纯枫树糖浆在做菜时是糖的绝佳替代品，包括甜点和烘烤食物。好的，今天我们学习的词是 substitute, substitute, substitute...