1. To test the polluting power 2. collected samples of deposit3. closest to the colony4. far more pollutants 5. less affected by6. appear to come from点击“下一章”,开启听写训练Day44~
1. To test the polluting power
2. collected samples of deposit
3. closest to the colony
4. far more pollutants
5. less affected by
6. appear to come from