单词	celestite
释义	celestite noun ce·​les·​tite ˈse-lə-ˌstīt  sə-ˈle-ˌstīt : a usually white mineral consisting of the sulfate of strontium Example Sentences Recent Examples on the Web The baryte group also includes celestite, or strontium-sulfate, used to produced purple fireworks. David Bressan, Forbes, 4 July 2021 Word History Etymology German Zölestin, from Latin caelestis First Known Use 1854, in the meaning defined above
随便看	out of joint out of keeping with out of kilter out of line out of luck out of necessity safety straps safety switch safety switchboard safety tread safety tube safety valve safety valves safety zone safety-deposit safety-fund system safety/strength in numbers safetying safetyman safetymen saffi saffian saffians safflor safflorite

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