作为应用又确定了保群逆线性映射形式。

As applications, we also determine the forms of linear maps preserving group inverses.

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有围栏隔开或保围的建筑物或建筑群，尤指住宅或居民区。

Compound: a building or buildings, especially a residence or group of residences, set off and enclosed by a barrier.

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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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