Environmentalists are keen on degradable materials.环保分子特别喜爱能够自然分解的材料.Starch - based biodegradable plastics is a kind of important degradable polymer material.淀粉基生物降解塑料是一种重要的可降解高分子材料.Phosphate ester polymers are degradabl...
商店一般都不愿收回顾客不称心的货物.Shops are often reluctant to take back unsatisfactory goods.他很可能采取立刻就能令人称心的方针.More likely he would choose the most immediately comfortable course of action.新鞋不会不称心的.A new pair of shoes wouldn't com...