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It's not fair!
真不公平!
What's not fair?
什么不公平?
I was rereading the Constitution of the United States. It says here that “All people are created equal.”
我又读了一遍《美国宪法》，上面写着：“人人生而平等。”
That's just not true!
事实并非如此!
What do you mean?
你想说什么?
Well, it's always being my dream to become the Olympic champion in the 100-meter-dash.
成为奥运会的百米短跑冠军一直是我的梦想。
But no matter how hard I train, I'm just not fast enough.
可是，无论我多么努力，我就是跑不了那么快。
You just realizing this now.
你才意识到啊!
Some guys are simply faster than everyone else.
有些人就是比别人都跑得快。
That's because some people are born with more faster twitch muscle fiber than others.
那是因为他们天生比他人多快收缩肌纤维。
With what?
有更多什么?
That's a big part of what make people faster than others.
快收缩肌纤维大大地决定了跑步速度。
Muscles are made of two kinds of fibers–fast twitch and slow twitch.
肌肉有两种纤维构成：快收缩肌肉纤维和慢收缩肌肉纤维。
What's the difference?
有什么不同吗?
Slow-twitch fibers use energy aerobically and can work for long periods of time before getting tired.
慢收缩肌肉纤维用于有氧耗能，适合耐力性运动。
译文为可可英语翻译，未经授权请勿转载!
