无类别包括随机资料，所有这些载成员大不相同类群和物种。

None of the classes included random profiles, all of them contained members from vastly different taxa and species.

youdao

早先，我认为这种模式是随著年复一年干季与湿季的交替，不同类群的沉积物堆叠而成，也就是小河流经湿地的典型沉积。

Early on, I believed that this pattern developed as different kinds of sediments were deposited in dry versus wet seasons throughout the years-as is typical in wetlands fed by small rivers.

youdao