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A lot of sciences rest on data that is flawed in some ways because of the difficulties in assessing what people eat.
许多依赖数据的科学常识是有瑕疵的,由于评估人类所吃食物非常困难
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Let's pretend that you have gone out to a dinner with a friend and it has been delicious
假如你与一位朋友外出就餐，食物非常可口。
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The minerals are present in small amounts in food and as a function of body weight as well.
矿物质,在食物中所占比例非常小,在体重中所占比例也非常小
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Just really, really tasty food like salami and cheeses and stuff like that.
非常非常美味的食物，比如意大利腊肠和芝士这一类的东西。
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That was the natural thing to do given the character of life, which was based upon farming, if you leave you lose your farm, and based upon the difficulty of transportation.
生活的意义就是定居一处,种田养家,离开了这片土地,就失去了食物的来源,另外,古时的交通非常落后
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And really good food and good bars. And there, it's quite artsy,
有非常棒的食物和酒吧。那儿很有艺术感，
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In order to have a completely balanced diet that's completely plant based, one has to be very careful about having a wide array of foods.
为了形成一个完全以素食为主的,平衡饮食结构,你必须非常注意,广泛摄入各类食物
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As we'll discuss later, the language that gets used with these things is very interesting.
我们今后会讨论,描述食物的语言也非常有趣
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It's a very interesting argument and really does affect our relationship with food.
这是非常有趣的论点,确实影响了我们对食物的看法
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So the perception is really important here.
因此,在这里对食物的认知非常重要
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Then also a problem is you can't weigh things when you're eating out, so even if you were being incredibly precise about stuff at home and you were actually weighing things, you couldn't do that very well when you're eating out.
问题是,当你在外吃饭时无法称量食物,所以即使你在家中非常精确地测量食物,并且实际测量了每样物品,但在外吃饭时你可没法这样干
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For example, nowhere in the world would people consider eating a rock, because a rock is non-food across all cultures; but aside from that, there's great variability and so social construction part of this is very important.
举例来说,世界上没有哪里的人会想吃石头,因为不管在哪种文化中,石头都不能当做食物,但是除此之外,各地的食物丰富而多样,所以社会意识是非常重要的一部分
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