短語詞組短語Essential Trace Element 必需微量元素essential core element 心要素;核心要素;必需核心要素essential production element 核心生産要素essential nutrient element 必需營養(yǎng)元素essential map element 地圖基本要素essential laser element 激活激光元件essential mineral element 必需鑛物質(zhì)元素;元素essential trace element detail 必需微量元素essential trace element including 人躰必需微量元素 返回 essential element