单词:gametologist
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This is Scientific American's 60-Second Science, I am Karen Hopkin. This'll just take a minute. Biologists, traditionally track migrations by tagging animals with devices that allow their movements to be monitored. But Homo sapiens can't be fitted wi
By Carol Pearson Washington, DC 08 November 2006 watch Heart Stent report Heart stents are lifesaving medical devices that help prevent heart attacks. Most of these stents are coated with various drugs, but mounting data suggest drug-coated stents c
今天我们要学的词是Christmas。 Christmas, 是圣诞节的意思。A Christmas gift, 是圣诞礼物。A Christmas card dated Dec. 23, 1914 finally reached its destination after 93 years, 一张1914年12月23号寄出的圣诞贺卡经过93年,
今天我们要学的词是Christmas。 Christmas, 是圣诞节的意思。A Christmas gift, 是圣诞礼物。A Christmas card dated Dec. 23, 1914 finally reached its destination after 93 years, 一张1914年12月23号寄出的圣诞贺卡经过93年,