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Simmons died in Longmont, Colorado on 21 February, with his wife and daughter at his side, his obituary announced.
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水安全是涉及国家长治久安的大事。世界上规模最大的水利基础设施体系，为畅通国内大循环、构建新发展格局发挥了重要作用。
Nature, Published online: 26 February 2026; doi:10.1038/d41586-026-00602-z