1·The molecules of the soil or streambed would become smaller and simpler.
土壤或者河床的分子会越来越小，越来越简单。
2·Some forestry companies use forest management practices that allow more trees to remain uncut and include streambed restoration and less harmful road-building.
一些林产公司通过森林管理措施，包括保护更多的树木、河床复位和减少有害的公路建设。
3·Use stones that mimic a natural streambed, although granite's blues and grays can make a striking visual impact.
用石头，模仿自然河床，虽然花岗岩的蓝色和灰色可以作出醒目的视觉冲击。
4·A ridge, as of sand or gravel, on a shore or streambed, that is formed by the action of tides or currents.
沙洲，沙滩：在海边，河床等处由沙子或小石子形成的隆起，由潮水或水流运动而形成。