count[idx]--; // 该值的可用位置-1
const n = position.length;
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习近平总书记深刻指出，“组织东部地区支援西部地区，而且大规模长时间开展这项工作，在世界上只有我们党和国家能够做到，这就是我们的政治优势和制度优势。”
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Donald Trump has spent much of his second term at war with science and scientists. He is cutting staff at institutions such as the Environmental Protection Agency (EPA) by a third, and has cancelled or frozen up to 8,000 federal research grants. This hasn’t just hurt individual research programmes, it has damaged America’s credibility as a reliable partner in the scientific community. It is not surprising that many researchers – one poll last year by the journal Nature gave the number of 75% – say they are considering leaving the US entirely.