音波透过不同介质，会产生不同的穿透损失，故利用特殊的消音材料，以达到消音效果。
Sound wave passing through different mediums produces varied intensity diminution; hence, greater sound muting materials can be utilized for noise reduction.
该投加点面临的主要问题是活性炭穿透滤料层以及水头损失过快增长导致滤池过滤周期的大幅度缩短。
The major problems in this technology are PAC penetrating filter material layer and the great shorten of the filter cycle owing to the growth rate of filter head loss is so quickly.
赫尔南德斯可以给球队带来穿透力，他伤了是个损失。
With Chicharito in your team he gives you that penetration and speed, that was a loss.
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