实施保户保持策略的前提条件是对保户群进行价值细分。

The premise of carrying out the customer-keeping strategy is subdividing the customers value.

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方法采用分层整群抽样方法调查487户贫困家庭。

Methods With stratified sampling and cluster sampling, we investigate 487 families in poverty.

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适合电网不发达地区、游牧民区、高山独户、远离居住群的边远住所和检测场站，作为满足照明和看电视为主的供电。

It mainly used for lighting and TV power supply for undeveloped power grid area, such as nomads area, single family in high mountain, residence far away from living community and detection place etc.

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What they cared about-- because the Roman Republic by this time was basically a bunch of very important households, wealthy men and their households, and they were the members of the Senate, they were the knight class, they were the people who ran Rome.

他们在乎的是。。。因为当时的罗马共和国,实际上就是一群举足轻重的家户，富有男子及其家户所组成，他们是元老院成员，是骑士阶级，罗马的统治者。

耶鲁公开课 - 新约课程节选