The research on location accuracy and reliability is a very utility and challenge study task.

关于移动定位精度与可靠性的研究是一个非常实用，又具有挑战性的研究课题。

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The research on location accuracy and reliability is a very utility and challenge study task.

关于移动定位精度与可靠性的研究是一个非常实用，又具有挑战性的研究课题。

youdao