As with the UNION operator, the join operator itself remains synchronous and is only able to process input from one leg of the join at a time.
和UNION操作符一样，连接操作符本身是同步的，每次只能处理来自连接操作符某一个分支的输入。
It's just like, he would like to move his left side of his body, but he's not able to transmit the right input to move his left arm and left leg.
马里奥德情况正是如此，就像是，他想运动他的左侧身体，但他没法传送正确的输入信号，来运动他的左胳膊和左腿。
The voltage stress of the switches of the three-level leg is the half of the input voltage, and the switches can realize ZVS in a wide load range.
三电平桥臂的开关管的电压应力为输入电压的一半，可在宽负载范围内实现零电压开关；两电平桥臂的开关管的电压应力为输入电压，它们利用变压器的漏感来实现零电压开关；
The voltage stress of the switches of the three-level leg is the half of the input voltage, and the switches can realize ZVS in a wide load range.
三电平桥臂的开关管的电压应力为输入电压的一半，可在宽负载范围内实现零电压开关；两电平桥臂的开关管的电压应力为输入电压，它们利用变压器的漏感来实现零电压开关；
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