Electrical cables plugged in the wrong way would switch the "polarity" of a sensor, causing it to confuse left and right.

如果电缆放置错误将改变传感器的“极性(polarity)”，其后果是混淆了左和右。

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The photoinduced changes in polarity and molecular structure have led to widespread application of azobenzene derivatives as reversible molecular switch devices.

光致极性和分子结构的变化使偶氮衍生物作为可逆的分子开关器件得以普遍应用。

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Bipolar Hall Switch Sensor magnet polarity is no need to distinguish, with great flexibility and convenience.

双极性开关型霍尔传感器则无须判别磁体极性，具有很大的灵活性和方便性。

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Reality extends to the plain fact that there is no switch or level to push, pull or toggle that will instantaneously change the polarity of the flow.

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