常見(jiàn)例句雙語(yǔ)例句There are great meaning to develop this task for the sustainable development of tin sulphuric ore and economic benefit.開(kāi)展本課題的研究對(duì)該礦持續(xù)發(fā)展，提高經(jīng)濟(jì)效益有著重大的意義。 返回 tin sulphuric ore