单词	tetrahydrofuran
释义	tetrahydrofuran noun tet·​ra·​hy·​dro·​fu·​ran ˌte-trə-ˈfyu̇r-ˌan  -fyu̇-ˈran : a flammable liquid heterocyclic ether C4H8O that is derived from furan and used as a solvent and as an intermediate in organic synthesis Example Sentences Recent Examples on the Web In February, an Orange County man, whose name wasn’t released, died after taking tetrahydrofuran fentanyl, a synthetic substance similar to fentanyl, federal prosecutors said. Christal Hayes, OrlandoSentinel.com, 20 July 2017 Word History Etymology tetrahydro- + furan First Known Use circa 1943, in the meaning defined above
随便看	pulsatillas pulsating pulsating current pulsating organ pulsating star pulsating vacuole pulsation pulsation theory pulsational pulsations pulsative pulsatively pulsator pulsators pulsatory pulse pulse code modulation pulse deficit pulse duration modulation pulse family pulse frequency modulation pulse length modulation pulse modulation pulse oximeter pulse oximeters

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