Based on the technique of PWM rectifier, the DC voltage of the inverter was adjusted by controlling the switchorder of the switching elements.
基于PWM整流技术，并通过控制逆变器开关的导通顺序调节逆变器直流侧的电容电压。
2
In order to boost our sales and profits, we should therefore switch from newspaper advertising to frequent radio advertisements like those for Disc Depot.
为了提高我们的销售和利润，我们应该像 Disc Depot 那样，从报纸广告转向频繁的电台广告。
3
To make this well-formed, you would need to switch either the opening tag order or the closing tag order.