Even with very tight conductor-to-conductor spacing, parallel runs of 5 to 6 times signal rise distance are required before crosstalk becomes a problem.
即使在非常小的线间距的情况下，在大于信号上升的距离5到6倍的距离以上串扰才会成为电路设计的一个问题。
Electrostatic shielding is provided by surrounding the signal path with a conductor connected to a low impedance point in the circuit, preferably the lo input terminal of the measuring device.
利用连接到电路中一个低阻点的导体，将信号通路包裹起来，即实现了静电屏蔽，该低阻点最好是测量设备的LO输入端子。
There is no ticket conductor on bus, so passengers must pull the signal cord to let driver open the rear door when you get to the stop.
美国的公共汽车没有售票员，因此乘客到站下车前只有自己拉动钢丝绳告知司机有人要下车。
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