The first stage in solving the security problem starts with the development and design stage.
解决安全问题的第一步始于开发和设计阶段。
Design and construction: Development of the perfect design is to create yachts important early stage.
设计和建造：开发完美的设计是制造游艇的重要前期阶段。
Design and construction: Development of the perfect design is to create yachts important early stage.
设计和建造：开发完美的设计是制造游艇的重要前期阶段。
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