We found a large flat rock to sit on.

我们找了一块可以坐的大而平滑的石头。

《牛津词典》

They sat at a flat rock.

他们坐在一块扁平的岩石上。

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Drizzt found a flat rock to sit upon and bade Catti-brie to join him.

崔斯特找到一块平坦的岩石坐上去，要凯蒂布莉尔跟他坐在一起。

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From high in the air, visitors can clearly see the third area of the park -- a high broad flat rock known as the Island in the Sky.

VOA: special.2009.04.15

As a result of the new contract, Ford will expand production of the Fusion, now built in Mexico, by adding a line at its plant in Flat Rock, Mich.

MSN: Ford��s union deal could help investors too

As Devils forwards Jacob Josefson and David Clarkson screened Rangers goaltender Henrik Lundqvist, Salvador flicked a soft wrist shot that skipped along the ice like a flat rock across a pond and through Lundqvist's legs.

WSJ: Devils Level Rangers to Even It Up

The flat slabs of rock currently being investigated by the rover have been dubbed "John Klein", the name of a Curiosity engineer who died in 2011.

BBC: Curiosity Mars rover takes historic drill sample