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 background to the current troubles is provided by the dire state of the country's economy.

目前这些问题的背景是严峻的国家经济形势。

《柯林斯英汉双解大词典》

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

Froman talked about how the current background check system was broken, noting that an "instant check" in Colorado can actually take about 10 days.

CNN: Gun debate: Where is the middle ground?

However, NRA chief executive Wayne LaPierre told the panel that the current background check system doesn't work, so expanding it would only create an unmanageable government bureaucracy instead of reducing gun crime.

CNN: Obama still backs new gun ban; top senator less certain