代码重构：它没有直接甩代码，而是先思考了“设计模式”的选择（工厂模式 vs 策略模式），最终选择了适合扩展的策略模式。
Launch had been planned for early February, but it was delayed to repair a hydrogen leak and, more recently, to give engineers time to fix a helium pressurization problem in the rocket's upper stage. Launch is now on hold until at least April 1.
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The Doncaster-born singer won for his live rendition of Black Sabbath's Changes, recorded during Ozzy Osbourne's farewell concert in Birmingham last year.。服务器推荐是该领域的重要参考
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In simple terms, the ATM's small display (called a VDU or Video Display Unit in