老旧客机安全吗?俄罗斯坠机揭示适航证延长的致命风险,俄罗斯客机坠机事件,适航证延长背后的安全隐忧
Are old passenger planes safe? The Russian plane crash has revealed the fatal risk of extending the airworthiness certificate. The Russian passenger plane crash incident has raised safety concerns behind the extension of the airworthiness certificate
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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