The mould design need more knowledge and experience, it limit the effort of reducing mould developing period.

模具设计需大量的知识与经验，这限制了人们缩短模具开发周期的努力。

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The top-down method was adopted to design the software, which shorted the developing period and enhanced the system's maintainability.

软件设计采用自顶向下的方法，缩短了开发周期，提高了系统的可维护性。

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Designing and manufacturing quality of extrusion mould immediately relates with the product's quality and product's developing period.

而挤压模具的设计与制造质量直接关系着挤压产品的质量，对挤压产品的开发周期有直接影响。

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During this period,many experts warned of mass starvation in the developing world where populations were expanding faster than crop production.

VOA: special.2009.11.10

So, the process of developing a vaccine occurred over a long period of time.

疫苗的发展经历了很长一段时间

耶鲁公开课 - 生物医学工程探索课程节选

We all know that overseas development assistance allocated to agriculture dropped from 18 percent in 1978 to just over four percent in 2008, The amount of money spent by developing countries on agriculture during that same period also dropped sharply.

VOA: standard.2010.03.29

Over that period, meat consumption in developing countries rose five-fold, three times as fast as in developed countries.

ECONOMIST: Make it cheaper, and cheaper | The

Unfortunately, a significant minority of traumatized people will suffer terribly and for an extended period as a result of developing post-traumatic stress disorder, or PTSD.

CNN: PTSD: Know the symptoms and when to get help

You simply cannot interact in that intimate way, over so long a period of time, without developing an abiding appreciation for the person that some would argue affects objectivity.

CENTERFORSECURITYPOLICY: In Honor of Mary Lou Forbes