白垩纪尚无壳斗科可靠的大化石记录,微化石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分化出两个类群.No creditable macrofossil record of the Fagaceae exists in the Cretaceous equivocal and require further study....
We shall now discuss some of the implications of these formulae.现在我们来讨论这些公式的某些内容.It will be useful to summarize the relevant Gaussian formulae.有必要概括地讲一下有关的高斯公式.Once multiple scattering becomes invoved simple formulae suc...