模拟放大、工程设计、设备制造和材料性能的问题，是我国合成氨工业技术进步缓慢的主要原因。
Problems existed in simulation scale-up, engineering design, equipment manufacture and materials properties are main causes for the slow technical progress of the ammonia industry in China.
尽管经济困难重重、技术进步缓慢、国际进行制裁，它的陆军仅仅因为规模庞大这一条就不能加以忽视。
But despite economic stagnation, technological limitations and international sanctions, its conventional forces can't be discounted, if only because of their size.
新的诊断工具现已面世，但技术转让进程依然缓慢，太多的实验室因缺乏适当的设备和人员而无法吸收和采纳这些技术进步。
New diagnostic tools have become available, but technology transfer is slow and too many laboratories are not equipped and staffed to absorb these technical advances.
怀疑派的模式倾向于，他们平静地认为，可再生资源技术进步的步伐太过缓慢，极大地增加了尝试限制碳排放量的费用。
The skeptics' models tended to assume, quietly, that the pace of technological advance for renewable energy would be sluggish - significantly raising the costs of trying to cap carbon emissions.
怀疑派的模式倾向于，他们平静地认为，可再生资源技术进步的步伐太过缓慢，极大地增加了尝试限制碳排放量的费用。
The skeptics' models tended to assume, quietly, that the pace of technological advance for renewable energy would be sluggish - significantly raising the costs of trying to cap carbon emissions.
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