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The results indicated that paraquat had a significant effect on soil microflora in thirty days.
结果表明,施用百草枯对土壤微生物有明显的影响.
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As Simon was under orders to make haste, some days they covered thirty miles.
西蒙接到命令要求抓紧行动，有些日子他们一走就是30英里。
《柯林斯高阶英汉双解学习词典》
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