基本解释演变evolvement outcome 同义词演化 蜕变 例句A gradual process in which something changes into a different and usually more complex or better form.演变，演化，展开一事物演变成另一种更复杂、更好状态事物的逐渐转变过程soil evolution土壤演变river channel process河床演变estuary channel process河口河床演变evolution of reservoir banks水库库岸演变
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