elements concentration的用法和樣例：
例句
- Ultimate analysis provides an useful inventory of the distribution of the major elements in humic substances.
元素分析提供腐殖物質(zhì)中主要元素分布的有用資料。 - The discovery of meteorite craters will make progress on the research of some endemic disease and some special elements spread.
隕石坑的發(fā)現使有關(guān)某些地方病和某種特異元素分布的相關(guān)性研究將可能取得新的進(jìn)展。
