These fragments got their smooth, round shape by rolling along the stream bottom.

这些碎片是沿着溪底滚动而得到光滑圆形的。

These fragments got their smooth round shape, though, rolling along the stream bottom.

这些碎片沿着河底滚动，形成了光滑的圆形。

And then the dust was settling and the brown-black mass was at the first corner and slowly streaming round the bottom straight and Bond felt the glasses slip in the sweat round his eyes.

然后尘埃落定，棕黑色的物质在第一个拐角处缓缓流过底部笔直，邦德觉得眼镜在他眼睛周围的汗水中滑落。