By using satellite vedio information, the types and grades influenced soil erosion factors could been drawn out, but the quantities of soil erosion could't been provided directly.
应用卫星影像信息可提取影响土壤侵蚀因素的种类及量级，但不能直接提供土壤侵蚀的数量。
The language teaching plays were put out live but also recorded in the studio on vedio-tape, so that they can be shown again and again.
语言教学短剧现场播出，但也在演播室内录制在录相带上以便能不断重放。
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