词汇	first-class matter
释义	first-class matter 美第一类邮件邮递
随便看	second order logic second-order logic second order loop second-order loop second order loss sensitivity index second-order manifold method second-order Markov chain second-order Markov process second-order Markov-proeess second-order matrix perturbation second order maximum condition second-order maximum condition second-order mement model second-order MI secondorder microelastic solid second order microelastic solid second-order microelastic solid secondorder microfluid second order microfluid second-order microfluid second order minimaxity second order mixed equations second order model second-order model second order modeling