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Progress of research and development for single-site catalyst of polyolefin were summarized, combining Research Status of single-site catalyst in China and Petrochina Company Limited, Future development plan of single-site catalyst in Petrochina Company L
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摘要综述了世界聚烯烃单活性中心催化剂的研发进展，结合我国内及中国石油天然气股份有限公司单活性中心催化剂的研究现状，提出中国石油天然气股份有限公司发展单活性中心催化剂的机遇、挑战及对策。 |
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Progress of the modeling of automotive exhaust catalytic converter was introduced, including the gas flow characteristics inside the converter, transport phenomena and reaction kinetics occurring in a single channel, the inter-channel heat transfer and th
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摘要本文主要介绍汽车尾气催化转化器模型的研究进展，包括反应器内气体流动特性、单通道反应器内的传递现象和反应动力学、通道间的热传递和反应行爲的模拟；并指出认识反应器内的各种特性和规律对设计汽车尾气催化转化器的必要性和意义。 |
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Progress on its mechanisms, symptoms, pathology, classification and therapy are reviewed in this paper.
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本文对其病因、临床表现、分期及分型、病理和治疗的研究进行综述。 |
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Progress on the project is slow because the client raises problems at every turn.
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这个项目的进展缓慢，因为委托人每个阶段都提出问题。 |
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Progress was made in population work and family planning.
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人口和计划生育工作取得新进展。 |
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Progress while others are lagging behind.
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当别人落后时你进步。 |
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Progress will lead to advancements in understanding tectonics, Earth history, materials and complexity, to name just a few.
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这方面的进展将导致对许多方面理解的进展，对板块、地球史、材料及其复杂性，这仅是几例。 |
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Progress with time, Guangzhou Lingli Elevator will improve our products and service to create more value and competitiveness for our customers in future.
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与时俱进，迅菱电梯将不负众望的以更优质的产品服务为各新老客户创造价值和竞争力。 |
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Progress, far from consisting in change, depends on retentiveness, ...Those who cannot remember the past are condemned to repeat it. --- George Santayana.
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进步，远不在于改变，而在于那些不变的东西。不能记住过去的人注定只能重复过去。有俗语说，忘记过去意味着背叛，背叛与否倒还有不同的评判标准，然而忘记过去只能重走过去的老路，犯过去的错误，的确让人扼腕。 |
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Progress, it moans, is “painfully slow and at risk of going into reverse”.
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它抱怨说，进步“是缓慢而痛苦的，并且有倒退的可能。” |
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Progress: The members of the conference, known as the Niagara Movement, assembled in annual meeting at Buffalo, July 11th, 12th and 13th, 1905, congratulate the Negro-Americans on certain undoubted evidences of progress in the last decade, particularly th
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进展：尼亚加拉运动会议成员1905年7月11日、12日和13日于布法罗召集年会，庆贺美国黑人在已往十年中无可置疑的进展，特别是在提高文化、购置产业、控制犯罪、提高家庭生活水平、发展文艺方面的进展，以及在管理宗教、经济和教育机构中所表现出来的建设性与行政能力的进展。 |
