I run fast enough 我跑得不够快
i couldn't run fast 我不能跑得快
I could run fast before 改为一般疑问句
i can run fast 跑得快 ; 我可以跑得快
I run very fast 我跑得很快
I don't run fast 我跑得不快
"I'm in the finals,it feels great,". "I knew that I was ready to run fast and I knew regardless of what happened I could win this race.
VOA: standard.2009.08.22
This is very important,which is why I am doing it: "If we want to know how fast a human being can run, then it is no use to average out the speed of a "good sample" of the population; it is far better to collect Olympic gold medal winners and see how well they can do.
这话非常重要,是我作这个研究的原因:,“如果想知道人类最快能跑多快,那从好的样本中测出平均数是“,没用的;,而应该收集田径类奥运冠军的信息,看他们能跑多快。
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