Very simply put, it works in this way: through a sophisticated system of electronics, television provides the capability of converting an image (focused on a special photoconductive plate within a camera) into electronic impulses, which can be sent through a wire or cable. These impulse, when fed into a receiver (television set), can then be electronically reconstituted into that same image.
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In addition to their remarkable scope and range, these collections contain a striking visual record of exploration: the impulse to collect the world is reflected in a large and diverse image archive.
除了范围极其广泛之外，这些收藏还包含了惊人的探索视觉记录：这个庞大多样的图像档案反映了要把世界收藏起来的冲动。
These two little words gave him a fresh impulse, and he bent his mind again to his task.
仅仅这两个字就给了他一种新的冲动，他又把心思放在了任务上。
One of the most effective and important methods for controlling an impulse -these worrisome urges that we have difficulty controlling -is to become more aware of it.
最有效和最重要的控制冲动——这些讨人厌的而且是难以控制的冲动——的方法之一就是更清晰的意识到这种冲动。
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