常見例句雙語例句The characteristics of plant communities on abandoned land in different years were surveyed in agricultural cross bedding in the south edge of Otindag sandy land.以渾善達克沙地南緣農(nóng)牧交錯帶不同年限棄耕地為對象,研究了不同年限棄耕地植物群落特征。Mean permeability of massive bedding fine shingle lithofacies and mean porosity of reverse cross bedding fine sand lithofacies are the biggest in all of lithofacies.塊狀層理細礫相的平均滲透率最大,反向交錯層理細沙相的平均孔隙度最大。The sedimentary structure mainly includes unidirectional and bidirectional cross bedding, interference and curved ripple mark, and wavy, flaser and lenticular bedding.發(fā)育雙向和單向交錯層理、曲線型和干涉波痕及波狀、脈狀、透鏡狀層理; 返回 cross bedding