“Middle Pennsylvanian”的概念、定义、翻译、参考文献-科学参考

单词	Middle Pennsylvanian
释义	Middle Pennsylvanian [`mid·ǝl ´pen·sǝl`vā·nyǝ] ^GEOLOGY The geologic epoch between the Upper and Lower Pennsylvanian.
随便看	air hoist airhole air horn air horsepower air hp air hunger air-injection reactor air-injection system air inlet air-inlet valve air-insulated substation air intake air-jet process air knife air-knife coating air-lance air launch air-launched ballistic missile air layering air leakage airless spraying air lift airlift air-lift hammer air-lift pump

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