单词	paper-train
释义	paper-train verb pa·​per-train ˈpā-pər-ˌtrān  paper-trained; paper-training; paper-trains transitive verb : to train (an animal, such as a dog) to defecate and urinate on paper indoors Word History First Known Use 1971, in the meaning defined above
随便看	sneak peek sneak preview sneak shooting sneak thief sneak thiefs sneak up sneak up on sneak-cup sneak-up sneaked sneaked up sneaker sneakered sneakers sneakest sneakier sneakiest sneakilier sneakiliest sneakily sneakiness sneakinesses sneaking sneaking up sneakinglier

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