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In Wales, an assistant coroner repeatedly recommended waterfall warnings after five recent deaths at scenic locations. South Wales Central assistant coroner Rachel Knight authored three Prevention of Future Death Reports advocating safety improvements.，更多细节参见钉钉
// Concatenation — works, but verbose，更多细节参见豆包下载
def elaborate_value(value, bb, before):，这一点在扣子下载中也有详细论述