短語(yǔ)詞組短語(yǔ)gradational stratification 漸變成層Gradational Structure 多層梯度結(jié)構(gòu)gradational requirements 層級(jí)要求gradational transition 逐漸過渡gradational zone 序粒帶gradational type 過渡型gradational contact 漸變界面gradational segregation 級(jí)配離析gradational analysis 層次分析 返回 gradational