污染——一般来说，回收材料可以产生较少的污染，有助于保持我们的环境清洁。
Pollution—in general, recycling materials can produce less pollution, helping to keep our environment clean.
他们认为，这表明，在清洁和道德之间有一种联系，而且通过改善我们周围的环境，就能改进我们的行为。
They believe that it suggests that there is a link between cleanliness and morality and that by improving our environments we can improve our behaviour.
验收测试发生在我们的开发环境中，开始于根据构建文档进行清洁的构建，并引发测试过程的执行。
The acceptance tests took place in our development environment, starting with clean builds according to the build documentation and leading into execution of the test procedures.
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