例如，大量的工作用来为软件项目成本估算产生有效和可靠的数据。

For example, a great deal of effort is put into producing valid and reliable data for software project cost estimates.

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目的：手术是腰椎间盘突出症和腰椎管狭窄症有效和可靠的方法。

Object: Operation is an effective and dependable way to treat Lumbar prolapsed intervertebral disc and Lumbar Spinal canal stenosis.

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实际使用证明该软件对可拆式螺旋板换热器的基本设计是有效和可靠的。

The actual service proves that this CAD software about DSHE is convenient, effective and reliable.

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