... Mean direction of flow 平均流向 direction of energy flow 能流方向 ; 能两向 direction of greater flow 货物主要流向 ...
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电能开关是控制能流方向的元件。
And the power switches are used to control the direction of power flow.
只要电容电压比系统电压高，则电能开关就能控制能流方向。
The power switches is able to control the direction of power flow as long as the capacitor voltage is kept higher than the system voltage.
声强就是声场中的声波强度，它等于通过与能流方向垂直的单位面积上的声能量。
Sound intensity is the sound wave intensity in sound field, which equals sound energy through the unit area perpendicular to the energy flow direction.
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