其设计原则是尽可能地保持电场的纵向分布和四极截止频率保持不变。

The designing principle is that the E-field longitudinal distribution and the local quadrupole cut-off frequency should be kept as constant as possible.

youdao

同样，这也是使用不同波形、不同频率的多个用户不能保持互操作性的根本原因。

The root cause for interoperability remains the same--multiple users in different frequency bands using different waveforms.

youdao

与你的另一半保持一个恰当稳定的交流频率，让她完成她的工作。

Keep a steady pace of communication with your partner, but let her finish her business there.

youdao