1.  without day
2.  non-scheduled

• 1. 不定期船: tramp | tramp vessel | tramping Ship
• 2. 不定期货船: ocean tramp | tramp steamer | tramp vessel
• 3. 不定期运输: Tramp transport | tramp shipping

更多释义

• 1.由于这些报告的延迟和不定期，这些数据应视为临时数据。
  Due to delayed and irregular reporting, these figures should be considered provisional.
  dict.yoduao.com
• 2.他不定期地看望父母。
  He visited his parents at irregular intervals.
  dict.yoduao.com
• 3.各个政府部门的服务都是不定期的。
  Services were irregular across authorities.
  dict.yoduao.com

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