A scheme of direct torque-control system of asynchronous machine with a simple Resonance Pole Zero Voltage Transfer (RPZVT) inverter is proposed.

提出一种采用控制简单的谐振极零电压过渡(RPZVT)软开关逆变器的异步电机直接转矩控制新方案。

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At the South Pole the winter average is about 73 degrees below zero.

而在另一端的南极，冬天的平均气温则在零下73度左右。

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This is really a pole-zero pair.

旁路电容是个真正的极零对。

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Other popular video clips viewed online included German diver Stephan Feck's 'zero point' dive, Cuban pole vaulter Lazaro Borges' pole snapping mid-vault and Usain Bolt's performance in the men's 100m final.

BBC: Serena Williams