单词	photomultiplier
释义	photomultiplier /ˌfəʊtəʊˈmʌltɪplʌɪə / noun An instrument containing a photoelectric cell and a series of electrodes, used to detect and amplify the light from very faint sources.With Pica, a photomultiplier detects the emitted photons but, because of the small number produced during switching, multiple passes have to be used to build up a picture of circuit activity.... The reflected fluorescence was detected via photomultipliers. Samples were also simultaneously imaged using the secondary electrons that were detected by a photomultiplier.
随便看	handspan hand specimen hand spectroscope handspike handspike ring handspoke handspring handstaff handstamp handstand handstone handstroke hand's turn hands up! hands-upper handsy hand-tame hand-tamed hand taut hand tennis hand-thrown hand-tight hand to fist hand-to-hand hand tool

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