{
  "kind": "合成样例，非现场测量",
  "id": "B05-N01",
  "input": {
    "now": 1000,
    "max_age": 30,
    "samples": [
      {
        "sampled_at": 990
      },
      {
        "sampled_at": 900
      },
      {
        "sampled_at": 1005
      },
      {}
    ]
  },
  "expected": [
    "接受",
    "过期",
    "时钟异常",
    "时效未知"
  ],
  "onsite_record": {
    "topic": "",
    "retain": "",
    "sampled_at": "",
    "received_at": "",
    "age_seconds": "",
    "decision": ""
  }
}