exact science
柯林斯詞典
1. N-SING If you say that a particular activity is not an exact science, you mean that there are no set rules to follow or it does not produce very accurate results. 精密科學(xué)[usu with brd-neg]
Forecasting floods is not an exact science. 預(yù)測洪水不是一門精密科學(xué)。
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