These soils usually contain large amounts of clay and easily become water-saturated.

这些土壤通常含有大量的粘土，很容易变成水饱和状态。

youdao

Second, as you know, sand dunes contain other types of particles, besides sand, including clay and silt.

第二，正如你所知，除了沙粒，沙丘还含有其他类型的颗粒，包括粘土和淤泥。

youdao

Many sedimentary rocks contain clay minerals and 76% of forming-rock minerals of slope rocks can produce clay minerals during the weathering processes.

除沉积岩斜坡含粘土矿物外，76%以上的斜坡岩石造岩矿物还可形成次生粘土矿物。

youdao

Different kinds of clay contain different minerals such as silicon or iron dioxide.

VOA: special.2009.09.09

In most places, though, are the remains of dried-up marshlands, barren clay and salt basins that contain the dunes' dramatic foil: the dead acacia or "camel thorn" trees.

CNN: Romancing the dune in Namibia