safety valves

  • na.保险阀;〈比喻〉缓和紧张状态的手段
  • 网络安全筏;阀门;充气式安全阀

复数:safety valves

safety valvessafety valves

safety valves

na.

1.保险阀;〈比喻〉缓和紧张状态的手段

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