除非有意外情况，我们应可按时到达。
遗憾的是，由于意外情况，今年的演出已被取消了。
Unfortunately, due to unforeseen circumstances, this year's show has been cancelled.
更重要的是，即使是最聪明的计算机程序也无法猜到教育者每天面对的所有意外情况并做出反应。
More importantly, even the smartest computer programs can't guess and react to all the unexpected situations that educators face daily.
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