在金字塔底部的单元测试很重要，这有几个理由。
The unit tests at the base of the pyramid are important for several reasons.
1992年 列出了部分美国人应该金字塔吃 从最底部谷物)(至少在顶端(脂肪、油和糖)。
The 1992 pyramid outlined the portions Americans should eat, from the most at the base (grains) to the least at the apex (fats, oils and sugars).
在金字塔的底部，许多拉丁美洲国家正在经历着小额信贷的繁荣，最好的例子是碧绿。
At the bottom of the pyramid, many Latin American countries are seeing a boom in microcredit. The best example is Peru.
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