p system testing
P系统检验
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Japan's Meteorological Agency is currently testing a prototype system which detects the oh-so-subtle "P Waves" that precede the destructive "S Waves, " and alerts major operations to halt their hustle and take cover.
ENGADGET: Japan Meteorological Agency develops earthquake warning system
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