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...
Rare Earths Group of South and North in Miscarry Now?南北稀土集团就这样流产了 吗 ?An iron case will keep the Earths field away from the compass.铁箱能使地球磁场不受指南针的影响.Belts of mountains are cause by movements in the earths crust.山丘带是由地壳移动而...
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...