The spiral model is adopted in this software to resolve object system by prototype system.

该系统开发采用了螺旋模型，使原型系统最终解决目标系统，形成用户所需要的系统。

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There is one management problem with the spiral model: how do you schedule the iterations?

有一个螺旋模型与管理问题：你如何安排的迭代？

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The spiral model is adopted in this software to re, lye object system by prototype system .

该系统开发采用了螺旋模型，使原型系统最终解决目标系统，形成用户所需要的系统。

youdao

Mercer model of prank calls: Let the person in on the joke before things spiral out of control.

CNN: DJs broke 'Do No Harm' rule

When the three researchers programmed their model to arrange PS10's mirrors in front of the tower in a segment from such a spiral, they both improved the efficiency of the collection process and saved space.

ECONOMIST: Solar energy