接下去,那位年轻的母亲提到一种挺新的代用品.Then the young mother mentioned some shockingly modern succedaneum.煤是一种可行的代用品.Coal is one viable alternative.植物油是动物油的良好代用品.Vagetable oil is a good substitute for animal oil....

“代用品”的英语可以翻译为：substitute，succedaneum，surrogate，quid pro quo ...