科研之友
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<正>China’s space industry had a busy year in 2022, the highlight of which was completion of one of the world’s largest and most sophisticated(复杂巧妙的；精密的) orbiting infrastructures, the Tiangong space station. After traveling for 15 months in low orbit, about 400 kilometers above the Earth, Tianhe, the space station’s core module, received its first long-term companion—the Wentian lab module—in late July.
