随后的调查必须能够指出，是什么使事件急转直下，到底发生了什么？
The investigation has got to find out, what was the turning point? What happened?
无论是填字游戏、九宫格游戏和使其他使脑筋急转弯的活动，其实是在保持你的大脑处于良好的状态，可是一直没有很好地建立起来。
Whether crossword puzzles, sudokus and other brain teasers actually keep your brain in shape, has not been well-established.
预算中他并没有提到2月份通胀数据达到了4.4%，这个糟糕的数字使财政状况急转直下。
He did not mention that a run of bad inflation figures (up to 4.4% in February) has made a fiscal U-turn trickier.
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