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。A vacant lot or a bombsite can, to the amateur naturalist, produce an extraordinary variety of flora and fauna.通过观察某些现存的动物群和植物群,我们就能更清楚地了解这种困难了.We shall appreciate this difficult...
Each tetrahedron shares two of its oxygens with neighboring tetrahedra.每个四面体都有两个氧原子是与其相邻的两个四面体共用的.The report said Lee halted shooting when a neighboring mosque held a prayer session.据报道,在传来教堂的午祷声,李安暂停停拍.An axial electron...