然而，今天工程师不仅有经验信息的优势，而且还有科学数据，允许他在事先进行仔细的计算。
Today, however, the engineer has the advantage not only of empirical information, but also of scientific data that permit him to make careful calculations in advance.
然而，今天工程师不仅有经验信息的优势，而且还有科学数据，允许他在事先进行仔细的计算。
Today, however, the engineer has the advantage not only of empirical information, but also of scientific data that permit him to make careful calculations in advance.
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