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科学60秒:现金付款更健康
We humans can so easily give in to our . Something as simple as a credit card can weaken self-control. The good news is that the reverse is also true: cash can . So says a study in the Journal of
背诵美文——化石
A Rare Fossil RecordThe preservation of embryos and juveniles is a rate occurrence in the fossil record. The tiny, delicate skeletons are usually scattered by scavengers or destroye
为师之道
短文What makes a teacher? It is customary for adults to forget how hard and dull and long school is. The learning by memory of all the basic things one must know is a most incredible and unend...
晨读美文004
晨读美文Sitting on a grassy grave, beneath one of the windows of the church, was a little girl. With her head bent back she was gazing up at the sky and singing, while one of her little hands was...