forming elements短语¹⁴⁴⁹⁷²⁺² 基本例句 构成要素forming element的复数 The extent of ore- forming elements and indicator elements supergene enrichment in soil on non- mineral region was even higher than that on mineral belt. 非矿化地段土壤中元素的表生富集程度较矿化带处土壤中元素表生富集程度更强； cnki