从山上冲刷下来的泥土就要让水电大坝淤塞了。The soil washed from the hills is silting up the hydroelectric dams.瀑布飞流直溅，冲刷着岩石。Waterfalls crash and tumble over rocks.海水冲刷着海岸。The sea washed against the shore....
There are differences between historical and astronomical numbering of years.在历史的年代数目和天文年代数目之间存在差别.In Attica there were four tribes, each consisting of three phratries, each phratry numbering thirty gentes.在阿提卡,共有四个部落, 每...
" 我想回廓上还有 锯齿形 的栏杆吧?" I suppose it had jigsaw work on the porch banisters? "我们来研究图9中一组相似三角形的锯齿形模型.Let's consider the sawtooth pattern of similar triangles in Fig . 9.槽刀采用锯齿形设计刀片, 省力耐用.The blade of groove is designed ...