His prose is always lucid and compelling.他的散文素来简洁、有力。In a rare lucid moment, she looked at me and smiled.在难得清醒的时刻，她看看我，对我笑笑。His explanation was lucid and to the point.他的解释扼要易懂....
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...