双参数的费米密度分布
Fermi-density-distribution with two parameters
双波长物质的量比法
dual wavelength substantial amount ratio method
双边拍卖的惯性
Inertia in double auctions
双1镝的硅钼杂多酸
Bis-1 molybdosilicate heteropolyanion with dysprosium
衰退市场的相对吸引力
relative attractiveness of declining markets
衰退的特色
Declining distinctiveness