干涉仪的两个臂长相差波导波长的四分之一，使器件在最佳线性点工作，无需外加电偏压。
Two arms of the interferometer are different in length by one -quarter of a guide wavelength, allowing the device to operate at its optimal linearity point without external electrical bias.
我的表姐在关掉生命仪的四分中内去世了，终年61岁。
My cousin died, aged 61, within four minutes of her life support machine being switched off.
我的表姐在关掉生命仪的四分中内去世了，终年61岁。
My cousin died, aged 61, within four minutes of her life support machine being switched off.
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