Weekly Address: Dispose of Your Expired and Unwanted Prescription Drugs (September 26, 2015) 奥巴马每周电视演讲：处理掉过期且不需要的处方药 Hi, everybody. Today, September 26th, is “National Prescription Drug Take-Bac

Hi, everybody. If you've ever played a game of basketball in a gym, or entered a contest in school, or started a small business in your hometown, 大家好。如果你曾在体育馆中打篮球,或者参加过学校的测验,在你的小城开办过小企业, you know that

The puzzle we came up with was an if-then rule. 我们想出的难题是个”如果-则“规则。 We asked the bees to learn not just to go to a certain color, but to a certain color flower only when it's in a certain pattern. 我们要求

SpringField Ilinois 斯普林菲尔德 伊利诺伊 Oct 19,1860 1860年10月19日 Miss Grace Bedell My dear little Miss 亲爱的小格蕾丝·贝戴尔小姐： Your very agreeable letter of the 15th is received. 你15日发寄来的信件已经收到了。 I regret the necessity

He walked faster, right? 他走得快一点了，是吧？ I call this the staircase illusion, 我把它称为阶梯假象， and actually when the staircase illusion abruptly ended, he froze, and this is called freezing of gait. 实际上，当阶梯假象突然结