切沟侵蚀不仅破坏土地资源，而且影响下游地区环境。
Gully erosion damages land resources and causes site off environmental problems.
自上到下侵蚀主要表现为片蚀、重力侵蚀、细沟侵蚀、切沟侵蚀、冲沟侵蚀、沉积。
From above to below, the erosion types ordinally are sheet erosion, gravitational erosion, rill erosion, gully erosion, sediment.
切沟侵蚀在土壤侵蚀中占据重要位置，切沟侵蚀监测研究是切沟侵蚀研究的重要方面。
Gully erosion holds an important position in soil erosion, and monitoring the gully erosion is the majorpart of the study of gully erosion.
方法三棱滑切固定矫治器的结构，以三棱形弓丝和具有三角槽沟的托槽为主体，由它控制矫治牙在各个方向的移动而发挥矫治作用。
Methods the structure of deltoid arch wire fixed appliance is consist of deltoid arch wire and bracket with deltoid colpus. It is used to control the tooth's moving.
坝地淤积，抬高了侵蚀基准面，可以防止沟道下切和沟岩扩张；
Silting in dams raise the erosion base. This can prevent guilybed from cutting down, and banks from expanding;
坝地淤积，抬高了侵蚀基准面，可以防止沟道下切和沟岩扩张；
Silting in dams raise the erosion base. This can prevent guilybed from cutting down, and banks from expanding;
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