I can't say enough good things about these Modern-Twist silicone placemats: they are easy to clean, feel silky to the touch, and are beautifully designed.

这些Modern Twist硅树脂餐垫实在太好用了，怎么赞美都不过分：它们容易清洁，摸起来非常丝滑，设计也美观。

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These demonstrations required very little preparation -- perhaps just a clean build and a quick run-through to make sure things were working acceptably.

这些演示要求很少的准备 — 也许只是不加修饰的构建版本并且快速的执行构建版本的使用过程以确定系统是可以被接受的。

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In fact, these are the things to clean up.

其实这些都是清理之中的事。

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Without these things, we would not have clean, drinkable water, or the ability to convey wastewater away from our homes to treatment facilities, or systems to handle the vast amounts of garbage we produce, or anything to drive on to accommodate our four-wheel lifestyles.

FORBES: 2012 is the Year America Must Get Serious About its Infrastructure

These riverside towns also hope to bargain for federal dollars in order, among other things, to clean up the land that riverside industry polluted.

ECONOMIST: Cities and rivers