更多符号

More symbols

以上为机器翻译结果，快速获取精准的人工翻译结果，建议选择有道人工翻译

1
有符号的除法要耗费更多的时间，因为除法是使最终结果趋向于零的，而移位则是趋向于负无穷。
The signed division will take more time to execute because it rounds towards zero, while a shift rounds towards minus infinity.
2
该例使用矩形符号，因为对于角色它拥有更多的空间。
This example USES the rectangle notation because it has more room for the roles.
3
主要的理由是，他们希望 UML 模型能够表达模型驱动架构（MDA），这意味着 UML 必须支持更多的模型驱动的符号。
The main reason was that they wanted UML models to be capable of delivering Model Driven Architecture (MDA), which meant that the UML had to function as a more model driven notation.

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