have not a speck of
没有一点吗
以上为机器翻译结果，长、整句建议使用 人工翻译 。
He would have to make sure, for example, that his clothes did not accumulate a single extra speck of dust that was not there one day earlier.
比如，他的衣服上不能多出一片之前一天没有的灰尘。
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