However, building projects for underground train systems in Hanoi and Ho Chi Minh City have had repeated delays.

然而，在河内和胡志明市建设地铁系统的项目一再推迟。

Boeing has faced repeated delays as it struggles to complete NASA's flight testing process before it can receive approval to start running official trips to the ISS.

波音公司一再面临延误，因为它在获得批准开始正式前往国际空间站之前，很难完成NASA的飞行测试程序。

But the company's ambitions to build and operate its own factories has run into repeated delays, so it wasn't able to meet demand.

但该公司建立和运营自己工厂的雄心一再遭到拖延，因此无法满足需求。

Sunday's attack came a week after Somali leaders agreed to wrap up parliamentary elections by February 25 following repeated delays that have threatened the stability of the troubled country.

周日这场袭击发生的一个星期前，索马里领导人同意在2月25日之前结束议会选举。此前议会选举一拖再拖，已威胁到这个动荡国家的稳定。

NASA, America's space agency, has been trying to fly the Space Launch System (SLS) since August 29th, but technical problems (and later a hurricane) have meant repeated delays.

自 8 月 29 日以来，美国航天局 NASA 一直在尝试试飞太空发射系统 (SLS)，但技术问题（以及后来的飓风）导致一再延误。

It took off last spring and was supposed to have circumnavigatedthe globe last summer, but a damaging storm, battery problems and the need for near perfect flying conditions have repeated delayed the journey.

它于去年春天起飞，原定于去年夏天环绕地球飞行，但一场破坏性的风暴、电池问题以及对近乎完美飞行条件的需求一再推迟了旅程。