work out a mine的用法和樣例：
例句
- A mine is exploited for its minerals.
開(kāi)發(fā)礦山是為了采礦。 - Delma mainly engages in the import and export of blocks, Mine investment and planning, new materials developing of new materials as well as the market development.
致力于推動(dòng)和合理開(kāi)發(fā)礦山資源及新品種的品牌建設和市場(chǎng)開(kāi)發(fā)。
