This means that causes of death are neither known nor recorded, and health programmes are left to base their strategies on crude and imprecise estimates.

这意味着既不清楚也不记录死因，卫生规划只能以粗略和不准确的情况估算作为制定战略的基础。

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Early emulsion muds used diesel or crude oil dispersed into alkaline water-base muds.

早些的乳化泥浆是将柴油或原油分散到碱性水基泥浆中。

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Daqing crude oil production using a high viscosity index base oil and 25 oil-based transformer oil, add antioxidant, anti-rust additives, such as by modulation.

采用大庆原油生产的高粘度指数基础油和25号变压器油为基础油，加入抗氧、防锈等多种添加剂调制而成。

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So long as they buy dollars, and use dollars as a base to sell crude oil from Iran to China, or sugar from Brazil to Russia, then the dollar will remain the most important currency on the planet.

FORBES: What Happens in a World Without Dollars?