单词	safety paper
释义	safety paper noun : a paper (as the silk-fibered paper of the U.S. currency or the watermarked paper of Bank of England notes) difficult to duplicate or so made that erasures or changes in matter written or printed on it are readily detectable Word History First Known Use 1836, in the meaning defined above
随便看	instreamings instrengthen instressed instresses instressing instrn instroke instrokes instruct instructed instructible instructing instruction instruction card instructional instructional scaffolding instructions instructive instructively instructiveness instructivenesses instructor instructorial instructors instructorship

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