9 请帮忙翻译一下,非常感谢
25 Wet scrubbers are efficient devices but have two major drawbacks .
1) They produce a visible plume,albeit only water vapor that quickly disappears.
The lay public seldom differentiates,however,and hence public relations often dictate no visible plume.
2) The waste is now in liquid form,and some manner of treatment is often necessary.
参考答案:25 湿洗涤器很有效,但有两个缺点
1)它们会产生可见烟雾,虽然仅为水蒸汽,而且会迅速消失
一般没有问题,但是通常会要求不能出现可视烟雾。
2)此时废物为液体,有必要进行一些处理