以四端网络的端口特性为依据，提出了双口网络的补充方程。应用该方程得出了双口网络联接的有效性条件。
The extended equations of two-port network are given on the basis of the four-terminal characteristic. The effective conditions of two-port network connection are presented.
对于线性非时变的无源二端口网络，在零初始条件下，若存在互易性及对称性，则其电路参数具有一定的特殊性。
If reciprocity and symmetry exist for passive two port networks of linear time invariant under zero intial condition, the circuit parameters will have some important characters.
介绍了采用三端口阻抗条件设计双栅FET混频器的方法。
A design method of DGFET mixer with three-port impedance condition is also described.
实验结果表明，在高加速度过载加载条件下从延期装置端口抛射出部分延期药颗粒，且延期药抛射量随过载加速度的增大而增加。
The results indicated that a portion of the delay charge was projected from the end of the delay unit during the course of the experiment, and the projecting quantity increased with the acceleration.
尽管如此，也有可能进行的步骤在不存在这样的设备的，条件是至少一个US B端口可用。
Nonetheless, it is also possible to carry out the procedure in the absence of such a device, provided that at least one USB port is available.
尽管如此，也有可能进行的步骤在不存在这样的设备的，条件是至少一个US B端口可用。
Nonetheless, it is also possible to carry out the procedure in the absence of such a device, provided that at least one USB port is available.
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