Reconstructing Documents from Segments
When you don't want to move your telescope manually, you opt for an equatorial mount which is designed to follow the track the movement of the objects in the night sky. Comparing with a dobsonian mount, equatorial mount offers more sturdy and expensive mount.
。关于这个话题，搜狗输入法提供了深入分析
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Melting point: Climate change is making chocolate more expensive, say scientists
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