Proponents of Big design Up Front design methodologies spend a lot of time before coding starts trying to determine all the required design elements for the application at hand.
BigDesignUpFront设计方法学的支持者在开始编写代码前，要花费大量的时间确定当前应用程序的所有必需的设计元素。
Non-circular gear, the instantaneous transmission ratio variation according to the required design.
采用非圆齿轮，瞬时传动比可按所需变化规律设计。
P in order to achieve the required design working life of the structure, adequate measures shall be taken to protect each structural element against the relevant environmental actions.
为了使建筑物达到规定设计使用年限，必须采取充分的措施保护每个构件免受相关环境作用的影响。
P in order to achieve the required design working life of the structure, adequate measures shall be taken to protect each structural element against the relevant environmental actions.
为了使建筑物达到规定设计使用年限，必须采取充分的措施保护每个构件免受相关环境作用的影响。
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