薄薄的一层表土被冲走了。A thin layer of topsoil was swept away.那单薄的土地很快就失去了表土,成为沙粒和尘埃.The fragile land quickly lost its topsoil and became nothing but sand and dust.从工地挖出的表土须用于筑堤的石笼上.Topsoil excavated from the work site shall be app...
They can trace their lineage directly back to the 18th century.他们的世系可以直接追溯到18世纪。The heroes and heroines are of ancient and aristocratic lineage.男女主人都是家世渊源的贵族.She was of ( an ) aristocratic lineage.她 有 贵族的血统....