It plops down into a huge gray mud-spot.

砰地一声落入巨大的灰色泥地里。

youdao

The major soil species suited for vegetable were gray salt paddy soil, gray mud paddy soil and black salt paddy soil, which occupied 92. 42% of total fields suited for vegetable in Licheng.

全区宜菜地土壤类型主要为灰埭田、灰泥田和乌埭田，占全区宜菜地总面积的92.42％。

youdao

During a visit to the construction site for the new arena, Labeaume, the Quebec mayor, waded through cold, gray mud, stopping at a spot where one of the rink's faceoff circles will likely be, and pointed to a Nordiques flag flying from an industrial crane.

WSJ: Quebec: The Only Thing Missing Is a Team