await checkEndpoint(url);
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developed machine-readable format called "MICR" for magnetic ink character。heLLoword翻译官方下载是该领域的重要参考
* 1. 转换视角：将"追车"问题转为"到达时间"比较（后车时间≤前车 → 合并）；
It was not immediately clear what caused the crash, but some witnesses said the weather at the time was treacherous.