然而，任何地表沙粒和土尘堆积物的增加，即应当是要采取保护性措施的一种警报。

However, any increase in surface build-up of gritty dust and dirt should be a warning for taking protective measures.

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另一种常见错误就是为对尘螨过敏的孩子购买加湿器；孰不知加湿器是尘螨最易于繁殖的地方。

Another was using a humidifier for a child who was allergic to dust mites; a humidifier tends to be a place where dust mites like to breed.

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有人指出灰尘的一种象征意指：如毒尘是当今工业的警示。

Some have noted a certain symbolism to the problem-the toxic dust a reminder of what those involved in heavy industry are too often subjected to, for example.

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