迄今污染控制有两种模式，一种是终端治理(end-of-pipe control)，另一种是污染预防(pollution prevention)与清洁生产(cleaner production)。
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Most gamers end up frustrated, cursing their slow fingers as the bird flies out of control or the pipe moves faster than they expect.
大部分玩家最后都是铩羽而归，在小鸟不受控制或者水管移动太快的时候咒骂自己反应迟钝的手指。
The reason of thickness of pipe end increasing in tension reducing is analyzed. The principle and method of cutting end control (CEC) are introduced. The key problems are discussed.
分析了钢管在张力减径过程中产生管端增厚的原因，阐述了切头端控制(c.e.c)的原理、方法，并就其关键问题进行了探讨。
It indicated that the strategy of industrial pollution control should be transferred from pipe-end treatment to pollution prevention.
指出工业污染控制必须从末端治理为主，转移到污染预防为重点的战略上来。
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