因此，这些传感器都被平行放置在太平洋沿岸即所谓的环太平洋地震带上。

That's why they [are] kind of parallel to coast lines in the Pacific, in the so-called Ring of Fire, where the subduction zones are.

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这个平行线是一个有半径的圆，这个半径是小于a的，因为如果这个环越靠近北极点，它的半径实际上会越来越小。

So now, this parallel as a circle of radius, well, the radius is less than a because if your vertical is to the North Pole, it will be actually much smaller.

youdao

永磁无刷电机中，平行充磁的2极磁环产生的气隙磁场是正弦分布的。

In a permanent magnet brushless motor, airgap field excited by a 2-pole magnet ring with parallel magnetisation is sinusoidal.

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