Background Current estimates of the costs of cancer care in the United States are based on data from 2003 and earlier.

目前美国肿瘤医疗费用的预测都基于2003年以前的数据。

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Background Current survival models for primary biliary cirrhosis have limited precision for medium and long-term survival.

当前对原发性胆汁性肝硬化患者生存模式的预测，多局限在预测其中期和长期得生存率。

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The selection of conditions on controlled potential, the kinds of supporting electrolyte and so on lessns the background current and makes the standard deviation less than 0.

进行了控制电位、支持电解质种类等条件选择，使得测定背景电流小，标准偏差低于0。

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And even if pupils are not taught about recent history, Mr Lang says that at least teachers should be aware of the background to current affairs and that training should be available.

BBC: Afghan bombsite

Selecting a new and equally compliant bunch against the current background of popular democratic sentiment could prove a bit trickier.

ECONOMIST: Hong Kong

Engineering the nomination of a new, equally compliant committee against the current background of popular democratic sentiment could prove tricky.

ECONOMIST: Dumping Tung | The