time.sleep(2 ** attempt) # 指数退避
BBC紀錄片：暗處的鏡頭——調查中國酒店偷拍影片黑市
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16:23, 27 февраля 2026Авто
Mahjong, Sudoku, free crossword, and more: Play games on Mashable
Consider some of the more obscure tests that implementations must pass: