sustainment造句

1、This new contract authorizes Boeing to start work on Sustainment Block 16.
这份新合同授权波音公司开始对第16保障区块(SB16)的工作。

2、Reliability assessment, sustainment and improvement.
可靠性评估，维持并改善。

3、The sustainment of economy and system to urbanization of Hunan.
湖南城市化的经济支持与制度支持。

4、Raytheon's mission sustainment and support services is also an example of IDS 'OpenAIR?
雷声的任务维护和服务支持也是IDS的OpenAIR ？