A vacant lot or a bombsite can, to the amateur naturalist, produce an extraordinary variety of flora and fauna.对于业余博物学者来说,在一片空地上或被炸后的废墟里可能发现种类繁多的植物群和动物群。...
The transitions of bisphenol A and phenolphthalein oligo -- polysulfones were inves - tigated by DSC.本工作用示差扫描量热法(DSC)研究了双酚A型和酚 酞 型两种聚砜预聚物的转变.Forbidden transitions are those for which dipole radiative transitions are not ...