基本解釋主要礦物；主成份礦物；基本礦物英漢例句雙語例句Selenium is an essential mineral found in trace amounts throughout the body.硒是人和動物機體生長發(fā)育所必需的微量元素。Magnesium is an essential mineral for the human body, and is needed for relaxing muscles , bone formation and activating B vitamins.鎂是人體必需的一種礦物質(zhì)，主要用于放松肌肉，骨形成和激活B族維生素。Tobacco is an important economic crop, and nitrogen is essential mineral element. Studies on carbon and nitrogenous metabolism of tobacco have important action on tobacco production.煙草是中國一種重要的經(jīng)濟作物，而氮是植物必需的礦質(zhì)養(yǎng)分，研究煙草碳氮代謝規(guī)律，對指導(dǎo)煙草的生產(chǎn)具有重要的作用。essential mineral更多例句詞組短語短語essential mineral element 必需礦物質(zhì)元素;元素essential mineral elements 必需礦質(zhì)元素Essential mineral elements in plant 植物必需的礦質(zhì)元素Essential mineral elements for plant 植物必需的礦質(zhì)元素mineral essential strain 稱為最小的必要牽引力essential mineral更多詞組專業(yè)釋義地球科學(xué)知礦物主要礦物