1. 稀释的：diluting water 稀释用水 | diluting 稀释的 | dilution air plant 换风装置

2. 稀釋：output pollution control 污染管制 | diluting 稀釋 | temporary 暫時的

3. 降低：eliminates...消滅 | diluting...降低 | identified...辨認

4. 淡化：involves含有 | diluting淡化 | rely依靠