In order to make more effective control of universal power qualitycontrollers (UPQC), an outer loop model for the voltage loop in a three-phase three-wire UPQC is proposed in the paper.
But the transmition from poor quality radios was slightly distorted and the accents of the Spanish speaking controllers was so strong that the pilots misunderstood a vital instruction.
但是质量很差的无线电信号有一点失真，而且说西班牙语的空管口音很重，导致飞行员误解了一条重要的指令。
3
But the transmit ion from poor quality radios was slightly distorted and the accents of the Spanish speaking controllers was so strong that the pilots misunderstood a vital instruction.