Reasonable models can be useful to quantitative analysis of the structures and define the timing and active ratio.

合理的模型选取有助于对构造进行定量化分析，确定构造形成时间与活动速率。

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Among other things, it examines how active users are, as well as their ratio of friends and followers.

它会检查用户的活跃度，也会注意好友和关注者的比率。

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At the same charge condition, the larger mass ratio of positive and negative active materials is, the more gas produces, the higher internal pressure is.

相同的充电条件下，正极与负极的活性物质质量比越大，产生的气体越多，内压越高；

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This produced a ratio of active premium payers to recipients of 1. 8 to 1.

FORBES: Why the Bureaucracy Won't Reform Old Age Welfare

At the same time the ratio of active workers paying into the system to retirees drawing from the system has reached 1.86 to 1.

FORBES: Old Age Pensions 10 Percent of GDP and Rising

Today there are almost 700, 000 GM retirees and just 70, 000 active workers, a 10-1 ratio.

FORBES: GM Loosening The Noose From Its Massive Pension Plan