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国产C909飞机安全运行突破100万小时

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Key Vocabulary

小时xiǎo shíHSK1

hour

安全ān quánHSK3

safety; security

运行yùn xíngHSK6

(of celestial bodies etc) to move along one's course

突破tū pòHSK6

to break through

国产guó chǎnHSK6

domestically produced

wànHSK2

ten thousand

飞机fēi jīHSK1

CL:架[jia4]

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国产C909飞机安全运行突破100万小时 - ISCBJ