• The internal record indicates that there had been concern about safety before the accident.

    内部记录表明,在事故发生前就已有了安全方面的担心。

    youdao

  • The internal record indicates that there had been concern about safety before the accident.

    内部记录表明,在事故发生前就已有了安全方面的担心。

    youdao

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