2025成都国际友城合作与发展大会举行，吸引39个友好代表团参会。成都的国际“朋友圈”不断扩容，国际友城和友好合作关系城市增至254个，覆盖全球五大洲。
Why reactivity? Notebooks are plagued by hidden state problems. All variables are global and mutable. Moreover, the output you see accompanying a cell depends on the order in which the cells were run. This has two big drawbacks:
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