That is before we look for the space to grow the grains, sugars, seeds and oils that provide us with the vast bulk of our current calorie intake.

在我们找到地方种植谷物、糖料作物、种子和油料作物之前，那些食物为我们提供了目前摄入的卡路里中的大部分。

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And largely for this reason that political power in Europe was centered for centuries in the South, around the Mediterranean Sea, which was where they could grow these grains with more reliability.

很大程度上，由于这个原因，欧洲的政治权力几个世纪以来都集中在南部，围绕着地中海区域，在那里他们可以更放心地种植这些谷物。

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The reaction lets kesterite grains grow within a few seconds and at relatively low temperatures.

该反应使硅藻土晶粒在几秒钟内和相对较低的温度下生长。

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