The requirements for evolution are much stronger than the usual backward compatibility.

演化的要求比通常的“向下兼容”的要求高了许多.

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Check backward compatibility with older versions of Flash.

检查向后兼容旧版本的闪光灯.

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This time around, the designers began their development with backward compatibility as a requirement.

这一次, 那些设计者开始了他们的研究,并把向后兼容性当成研究的要求.

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The current approach relies on backward compatibility, which is often difficult to guarantee.

目前的办法依赖于向后兼容, 而这通常很难保证.

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New rules on forward and backward compatibility for protocols specified in ASN. 1 have been agreed.

已同意对抽象语法记法1(ASN. 1)中规定的协议前向和后向兼容性的新规则.

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