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4669 引擎 yǐnqíng (noun: engine) 这架飞机因引擎故障而需要紧急迫降。 Zhè jià fēijī yīn yǐnqíng gùzhàng ér xūyào jǐnjí pòjiàng. This aircraft needs an emergency landing due to engine failure. Máy bay phải hạ cánh khẩn cấp do hỏng động cơ.