Managing survey/zh-cn

Table of contents:
 * Testing a survey
 * Validate Survey Logic
 * Activating a survey
 * Running a survey safely
 * Browsing survey results
 * Closing a survey
 * Changing an active survey
 * Importing a survey
 * Tokens
 * Email bounce tracking system
 * Iterate Survey
 * Data entry
 * Statistics
 * Exporting results
 * Exporting a survey structure
 * Excel Survey Structure
 * Quick-translation