residual origin残: incomplete; deficient积: amass; store up; accumulate成因: cause of formation; contribu ...沉积成因: sedimentary origin; sedimentogenesis沉积成因的: sedimentogenic下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:残积成因,即可在微信中查询翻译