mining in installments

例句：

1. 1. The company has decided to minein installments, starting with a smallproject.
   该公司决定分期开采，从一个小项目开始。
2. 2. The miningcompany is exploring the possibility ofmining in installments to reduce environmentalimpact.
   采矿公司正在探索分期开采的可能性，以减少对环境的影响。
3. 3. The government hasapproved the mining in installments plan forthe new mine site.
   政府已经批准了新的矿场地点的分期开采计划。