He knew that the South African government was trying to change its image so it could take part in the Olympic Games.
VOA: special.2010.02.07
Take your time. So, let's actually now take a 2-minute break, we're gonna change tapes and we'll come back and we'll actually write programs with a real computer and some real animated characters.
不急,现在休息2分钟,我们要换个录像带,一会再上课,等会开始写程序,构建一些动画人物。
Whether you take the elevator to the top of the Hancock Tower or whether you walk up the stairs, the change in gravitational potential is identical.
不管你是乘电梯,去大厦的顶层,或者是步行,重力势能的变化是相同的。
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