The ability to extend or customize UML is essential to MDA; UML can be customized to support the modeling of systems that will be completely or partially deployed to a Web services infrastructure.
扩展或定制uml的特性对MDA来说是很必要的；可以通过定制UML来支持系统建模，这种系统是需要完全或部分的部署到Web服务基础架构上。
A better approach is to protect people and incomes, providing support to workers between jobs and preserving their access to essential services during these transitions.
一种更好的方法是保护工人和收入，支持工人从事转型就业，确保其在转型期获得必要服务。
Special central financial transfer payment, to carry out essential public health services all over is a strong support.
中央财政的专项转移支付，对各地开展基本公共卫生服务是个有力的支持。
The fund says it will continue to support only essential services in existing programmes after a shortfall of hundreds of millions of dollars.
比先前缺少几亿美元后，该基金表示将仅仅继续现有项目的基本服务。
The biosphere of the Earth is essential to human survival and development. The services of ecosystems are critical to the functioning of the Earth's life-support system.
生态系统功能是地球生命系统的支持系统，为人类创造赖以生存的生态环境条件，有巨大的直接与间接经济价值。
The biosphere of the Earth is essential to human survival and development. The services of ecosystems are critical to the functioning of the Earth's life-support system.
生态系统功能是地球生命系统的支持系统，为人类创造赖以生存的生态环境条件，有巨大的直接与间接经济价值。
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