The test of double stepped backup rolls on 4 stand tandem cold strip mill at Anshan Iron and Steel (Group)Co. and the good results obtained are introduced.

简述鞍钢冷轧厂四机架冷连轧机采用双阶梯支承辊的试验及取得的良好成果。

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In a software development test environment, keeping track of your machines can prove very difficult, particularly when the number of machines reaches the double figures.

在一个软件开发测试环境中，跟踪机器被证明是非常困难的，尤其是当机器的数量达到两位数的时候。

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But the hospital says, because of the hurry, test results were given over the telephone and were not double-checked.

但是院方称，因为紧急，检验结果是通过电话确认，而且没有进行再次确认。

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Sehwag now has five of the fastest nine double hundreds in Test history, and has scored six in total.

BBC: Virender Sehwag blitzes Sri Lanka as India pile on runs

After winning the Test series West Indies are within touching distance of doing the double over England.

BBC: England 'embarrassed' by collapse

Personally, I went from my double century in the Adelaide Test, through weeks of low scores in Tests and one-dayers, then finished with two centuries and a 70.

BBC: P Collingwood