fluorine is pale yellow gas
... fluoride 氟化物 fluorine is pale yellow gas 氟是淡黄绿色气体 foaming agent 起泡剂 ...
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fluorine e is pale yellow gas
... flammable e 易燃的 fluorine e is pale yellow gas 氟是淡黄绿色气体 foaming g agent 起泡剂 ...
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