这种物质是约翰霍普金斯大学医学院的罗杰·克莱姆教授和理查德哈甘耐尔教授在研究训练老鼠把一种特定的声音和电击联系在一起这一课题时发现的。
Roger Clem and Richard Huganir of the Johns Hopkins University School of Medicine made the discovery while studying mice conditioned to associate a particular sound with an electric shock.
理查森（Lee Richardson）：“凯文·博阿滕（Kevin-Prince Boateng）选择为他父亲出生的国家加纳效力，而他的弟弟杰罗梅·博阿滕（Jérôme）则决定为自己的出生地德国踢球。
"Kevin-Prince Boateng has opted to play for his father's country of Ghana, while his brother Jérôme, has opted to play for his own country of birth, Germany, " writes Lee Richardson.
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