“focusing glass”的概念、定义、翻译、参考文献-科学参考

单词	focusing glass
释义	focusing glass [`fō·kǝs·iŋ ´glas] ^OPTICS A magnifying glass designed to enlarge the image thrown on the ground glass of the viewfinder of a camera, to help achieve exact focusing.
随便看	pulse-width modulation-frequency modulation pulse window pulsing key pulsing transformer pulsometer pultrusion pulverite pulverization pulverizer pulvillus pulvinus puma pumice pumice fall pumiceous pumice stone pumicite pumilith pump pumpability pumpability test pumparound pump bob pump-down time pumped hydroelectric storage

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