Bowling is a sport in which players attempt to score points by rolling a bowling ball along a flat surface, usually a wooden or synthetic surface, either into pins or to get close to a target ball.

保龄球是一种在平滑球道上用球滚击球瓶从而得分的体育运动，球道通常为木制或合成材料。

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The landscape is flat, or at most gently rolling.

这里风景单调，大多都是延绵起伏的缓坡。

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The well-paved surfaces and rolling hills became flat, dusty, pot-holed roads, with mountains never closer than the horizon.

在起伏的山地上铺设良好的道路变成了平地上坑坑洼洼，尘土飞扬的道路，而山却总是远在地平线上。

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For less-skilled riders, Ubin also has a network of rolling and flat gravel roads, and even the odd sealed stretch.

BBC: Singapore��s curious bicycle island

As our Land Cruiser sped off down toward the nine-tent Olakira Camp, the sheer scale of the landscape unfolded, the spiny flat-tops of the acacia trees dotting undulating fields of grass and gentle hills rolling out to wide open vistas of scruffy brush.

BBC: The Serengeti in the off-season

It's a fresh, relaxed ensemble that one could wear with flat sandals on a tropical holiday shedding the jacket and rolling up the shirt sleeves for after-dinner dancing and rum punches.

WSJ: Power Party Suits