1. Pollution from smoke and dust vitiates the air.
来自烟尘的污染损害了空气质量。
2. In addition, confusion over evaluation criteria vitiates many evaluation projects.
此外，在评鉴标准上的困惑砸毁很多评鉴计画。
3. Yet prohibition itself vitiates the efforts of the drug warriors.
然而，正是禁令本身使贩毒战士的努力归于实效。
4. They forgot about - or chose to deny - the Biblical teaching of original sin, which vitiates even the best actions in even the most sincere Christians.
他们忘记（或故意否认）圣经对原罪的教导&与生具来的罪会破坏最虔诚的基督徒的最好行为。