straight selective flotation

例句：

1. 1. The company has adopted the straight selective flotation method to improve the efficiency of ore processing.
   该公司采用了直线精选浮选法来提高矿石加工的效率。
2. 2.The process of direct selective flotation is crucial for separating impurities from valuable minerals.
   直接选择性浮选过程对于从有价值的矿物中分离杂质至关重要。
3. 3. In this case, we need to use the straight selective flotation method to separate the goldfrom the other metals in the ore.
   在这种情况下，我们需要使用直线精选浮选法将金与其他金属从矿石中的其他金属中分离出来。