A planetary parade, which occurs when several planets appear to align on one side of the Sun from Earth's perspective, will be visible in the UK again from sunset on Saturday.
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。业内人士推荐搜狗输入法2026作为进阶阅读
A piece of insulating foam on Columbia's fuel tank broke loose during launch, damaging the heat shield with devastating results.
Robot, take the wheel: What you need to know about autonomous vehicles rolling out across the U.S.