The flood waters carry in them soil (called silt) from the upper parts of the river valley to the lower partsand so to the sea.

河水把泥土（或叫淤沙）从上游河谷带到下游地区乃至入海口。

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They also will study chemical and physical properties of the soil samples with a method called infrared spectroscopy.

VOA: special.2009.01.20

"Those two earthquakes really opened up a lot of new research on something called soil liquefaction,in particular.

VOA: special.2011.03.28

They called it the Free Soil Party, because they believed in free land for free settlers.

VOA: special.2009.03.12

Next month, the group also will start test marketing a concept called the Soil Trust, an ambitious loan guarantee for money lent to local enterprises.

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Echale homes are made of adobe bricks called Adoblock, which use local soil.

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They are chemical variants of an antibiotic called rapamycin, which Wyeth researchers found in soil samples from Easter Island in the Pacific Ocean in the late 1960s.

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