1. Conductive tracks (31, 32) of a lower metallization layer deposited on the substrate (30) cross under tracks (37, 38) deposited on the upper side of the intermediate layer (35, 36) without making electrical connection.
沉积在衬底(30)上的下金属化层的导电轨(31，32)与导电轨(37，38)交叉而没有电连接，导电轨(37，38)沉积于中间层(35，36)的上面。
2. The MQTT client tracks any publications that were in flight in the event of a connection failure, and it attempts to complete the message delivery upon reconnection.
MQTT客户机可跟踪连接故障时的所有发布，并试图一旦重建连接就即刻完成消息传递。
3. It tracks the state of each network connection and determines whether the unsolicited incoming traffic should be allowed or dropped.
它追踪了每一次网络链接的状态，并决定未经请求的进站通讯申请是同意还是拒绝。