The United States has experienced a reduction of about 27 percent in the average annual exposure to fine particulate matter, with smaller declines in Europe.
美国人平均每年接触的细微颗粒物减少了约27%，欧洲的减少幅度较小。
2
In this paper, a novel decision table discretization algorithm is presented, which has fine attribute reduction function in time of data discretization and increases quality of classification.
本文提出了一个新的决策表离散化算法，该算法在离散化数据的同时具有良好的属性约简功能。
3
Nearshore shallow water environment, abundant terrestrial fine detritus, local reduction facies and zones are three cardinal conditions for the formation of uranium-rich sediments.