单词	periodic table
释义	periodic table noun : an arrangement of chemical elements based on the periodic law and proposed in various forms that are usually either short with only short periods (as in Mendeléeff's original table) or long with long as well as short periods (as in most modern tables)
随便看	rickettsiaceae rickettsial rickettsiales rickettsialpox rickettsiosis rickettsiostatic rickety rickey rickle rickmatic rickrack ricks ricksha rickshaw rickstand ricky rickyard ricky-tick ricky-ticky rico ricochet ricochet ricochet fire ricolettaite ricotta

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