单词	tie-down
释义	tie-down noun ˈtī-ˌdau̇n  : a fitting or a system of lines and fittings used to secure something (such as an aircraft or cargo) Word History First Known Use circa 1942, in the meaning defined above
随便看	pyrophoric alloy pyrophorus pyrophoruses pyrophorusses pyrophosphate pyrophosphates pyrophosphoric acid pyrophotographs pyrophotography pyrophotometer pyrophotometers pyrophyllite pyrophyllites pyrophyte pyrophytic pyropi pyropus pyropuses pyroracemic acid pyros pyroscope pyroscopes pyroses pyrosis pyrosises

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