短語(yǔ)詞組短語(yǔ)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 核心生產(chǎn)要素essential nutrient element 必需營(yíng)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 必需礦物質(zhì)元素;元素essential trace element detail 必需微量元素essential trace element including 人體必需微量元素 返回 essential element