世界羽联2024新加9.service板块下9.1.1条例很明确写了
1. Initiation of Service
Once the server and receiver are ready, neither side shall unduly delay the service. When the server’s racket head first moves forward (following the backswing as per Rule 9.2), the service is deemed to have started. Any hesitation after the racket head has completed the backswing is considered an undue delay.
(发球员和接发球员准备好后,任何一方不得不当延误发球。当发球员的球拍头首次向前移动(遵循规则9.2的后摆动作后),发球即被视为开始。球拍头完成后摆后任何的迟疑都被视为不当延误。)
现在重点应该是放在“不当延误”这四个大字上