The maintenance Mistake is an important factor threatening the flight safety.

维修差错是影响飞行安全的重要因素之一。

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So any simple mistake we made in our flight is not allowed.

于是，在我们的飞行当中是不应该发生低级失误的。

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So any simple mistake we made in our flight is not allowed.

于是，在我们的飞行当中是不应该发生低级失误的。

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