Know your customer.

了解你的客户。

Know your customer.

了解你的顾客。

Minimum steps to take to comply with the Know Your Customer rule.

最低采取步骤，以符合了解客户统治。

Focusing on getting to know your customers and how to retain your customer base.

集中在了解你的客户和怎样去保持你的客户群上。

These principles are to know your adversary, know your audience, and know your customer.

这些原则就是了解对手、了解观众以及了解顾客。