词汇	质量升级
释义	质量升级 increase the quality
随便看	dead-reckoning longitude Dead Reckoning Module Dead Reckoning Move dead reckoning navigation dead-reckoning navigation dead reckoning plot dead-reckoning plot Dead Reckoning Plotter dead reckoning point dead reckoning position dead-reckoning position dead reckoning position, DR dead reckoning recorder dead reckonings dead-reckoning sailing Dead reckoning system dead-reckoning system dead reckoning technique dead reckoning time dead reckoning tracer dead-reckoning tracer dead reckoning track dead-reckoning track dead reckoning Dead-Reckoning