调试技巧：加打印语句观察每轮变化
Currently the UK experiences about seven days a year where rainfall is more than 80mm a day – considered a heavy rainfall event. If 30mm of this falls in an hour it typically triggers a flash flooding warning.
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劉亮說，今年的農曆新年不會離開舊金山，但妹妹及妹夫會特地從洛杉磯過來，與他一起過年。
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