求翻译：如在讲到水资源时我们可以这样导入新课：老师可以采用滚动屏幕放映视频展现出大自然的美丽，然后呈现居民生活垃圾，生活污水，工业废水，废渣以及大量的空气污染以及能源污染，利用前后鲜明的对比引起学生的注意，集中学生注意力是什么意思？

Talked about water resources into the new lessons: the teacher can use the scroll show the video to show the beauty of nature, and then presents the household waste, domestic sewage, industrial wastewater, waste residue and a lot of air pollution and energy pollution in sharp contrast before and aft

As in the water, we can do this import new lesson: A teacher can use Scroll the screen video showing the beautiful nature, which are then rendered residents living garbage, sewage, industrial wastewater, and waste, as well as a large number of air pollution and pollution from energy use, and the con

If when talks about the water resources we may induct the new class like this: Teacher may use the trundle screen showing video frequency to unfold the nature the beauty, then presents the inhabitant to live trash, the sanitary sewage, the industrial waste, the waste residue as well as the massive a

As referred to in the water resources we can import new lesson: teachers can use to scroll the screen shows videos to demonstrate the beauty of nature, and then rendering residential house refuse, sewage, industrial waste water, air pollution and waste, as well as a large number of energy pollution,

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