The self cleaning technology can repel dust when sensors detect concentrations on the panel's surface have reached a critical level.

当传感器发现面板表面的灰尘浓度达到一定水平时，自我清洁技术可以将其清除。

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The alleged incursions come against the background of the new administration's efforts to expand the military's role in regional defense, including a "collective self defense" to help repel an attack on U.S. forces deployed in Asia.

WSJ: Japan: Russian Fighter Jets Enter Its Airspace