The Set::Object class implements a nice, fast set.
Object 类实现了较好且快速的一个集。
There is a small set of fast moving important change that is hard to predict -- the known unknowns.
有一小部分重要而快速的改变是难以预料到的 -- 已知的未知数。
Although the TB burden may be falling globally, the decline is not fast enough to meet the impact targets set by the Stop TB Partnership - to halve the 1990 prevalence and death rates by 2015.
虽然全球结核负担可能在下降,但是下降的速度并未快到足以实现控制结核伙伴关系确定的效果指标−到2015年将1990年患病率和死亡率减半。
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