重点放在现有顾客，GarySlack说，是SlackBarshinger公司的董事长兼首席执行官，为一个营销咨询公司在芝加哥和旧金山设有办公室。
Focus on existing customers, says Gary Slack, chairman and CEO of Slack Barshinger, a marketing consulting firm with offices in Chicago and San Francisco.
重点放在现有顾客，GarySlack说，是SlackBarshinger公司的董事长兼首席执行官，为一个营销咨询公司在芝加哥和旧金山设有办公室。
Focus on existing customers, says Gary Slack, chairman and CEO of Slack Barshinger, a marketing consulting firm with offices in Chicago and San Francisco.
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