selective chelating resin

例句：

1. 1. The selective breeding process isused to improve the quality of crops.
   选择性育种过程用于提高农作物的质量。
2. 2. The selectivepressures on women in the workplace areincreasing.
   职场上对女性的压力正在增加。
3. 3.The selective breeding of plants has led tothe development of new varieties.
   植物的选择性育种导致了新品种的发展。