I better say something about oil in the ancient world, so that you get a grip on what's going on here.
我最好说一下油在古代世界的地位,以便你能明白为什么会出售芳香油
.. You want to get it-- if you keep adding assets, you can do better and better on your portfolio standard deviation.
你想得到-,如果不断增加资产,组合的标准差就会越来越小。
One is how important it is to have more accurate measurement and how important it is for scientists to get a better handle on what people are eating.
其一是精确测量,是多么重要,对科学家来说,更好的处理人们吃了什么有多重要
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