4周搞定2000+托福核心词
有等级的；渐次的
gradational
常考释义
He recognized that there were three major kinds: fringing reefs, barrier reefs, and atolls; and he saw that they were related to each other in a logical and gradational sequence.
他识别出了三种主要的珊瑚礁：岸礁、堡礁和环礁；并且观察到珊瑚之间的排列是渐次有序、相互关联的。
来源于：阅读OFFICIAL47 P3adj. 渐进的；渐次的
adj. （陆地）均夷作用的【地理】
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