因为沉积作用是快速的, 分选作用和层理就得不到很好的发展.Because deposition is rapid, sorting and stratification are generally not well developed.轻的籽粒可以通过空气动力,即气流分选机清理出来.Light kernels may be removed by a pneumatic or air seperator.砂粒在波浪分选作用下从粉砂及粘土中...
Galapagos land iguanas belong to the genus Conolophus, of which there are currently three recognised species.加拉帕戈斯陆栖鬣蜥属于鬣蜥属, 其中目前得到确认的有三个物种.Feral cats in the region could be eating eggs and young iguanas, Gentile specula...