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英语翻译This phenomenon was first noted in Brussels,Belgium in 1

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英语翻译
This phenomenon was first noted in Brussels,Belgium in 1981 in asphalt rubber hot mix called "Drainasphalt".The study showed a dramatic reduction in traffic noise levels (Sacramento County 1999).
这个现象最早是在是在1981年比利时的布鲁塞尔发现的
一种叫“Drainasphalt".的 沥青和橡胶的高温混合物可以有效的大幅降低交通噪音~(萨克拉门托 郊区杂志 1999)
再问: Sample has been taken for 6 months of asphalt production, which allows to have a constant and uniform quality and then have been stored for experimental program. For each test, five repetitions are conducted where the average and the standard deviation have been calculated (according to standard procedure test). Mean values are used in the present study. 再给我翻译一下这段呗,我给加分
再答: 他们做了6个月的沥青测试实验,以达到一个恒定的唯一的品质,用于以后的实验项目~ 每个试验中,5个副本也同时进行,用来计算平均值和偏差(根据标准程序实验)。 最后得出的平均值(沥青和橡胶混合的比例)一直沿用至今~