Accelerate做“加速”之意讲，可做及物动词，也可做不及物动词。
1、sth. accelerates
Inflation continues to accelerate.
通货膨胀不断加速。
2、accelerate sth.
Exposure to the sun can accelerate the ageing process.
暴露在日光下会加快老化过程。
Expedite：加速/促进（行为或过程）。
Expedite economic reform加快经济改革步伐
Expedite the clearance 加快清关；加速清关
Expedite shipment 速运；加速发货
Precipitate：
1、通常指（坏事）加速、加快或仓促发生。
Precipitate crisis加快引发危机
Precipitate political crises促发政治危机
2、使突然陷入（某种状态），通常指不好的状态
The assassination of the president precipitated the country into war.
总统被暗杀使国家骤然陷入战争状态。
参考双语例句：
They also called for action to accelerate the work on the development related mandate concerning the TRIPS Agreement and the implementation related issues in the Doha Ministerial Declaration, especially on the issues of making intellectual property rules of TRIPS supportive of the objectives of the Convention on Biological Diversity as well as trade-related aspects of the TRIPS and Public Health.
他们还呼吁采取行动，加快制定与贸易有关的知识产权协议方面与发展相关的任务规定，尽快落实 《多哈部长级宣言》中与执行相关的问题，特别是关于制定支持《生物多样性公约》目标的与贸易有关的知识产权协议规则的问题，以及与贸易有关的知识产权协议和公共卫生在贸易方面的问题。
He also pointed out that many applications are pending for longer periods, but no action is taken by any member of the Committee to expedite the decision on them, and called on Committee members to deal with all applicant organizations in a non-selective manner, arguing that the result of the vote would allow the Committee to continue its interaction and dialogue with the organization to alleviate the concerns expressed by different members.
他还指出，有许多申请的等待时间延长，但是委员会成员仍未采取任何行动加速对这些申请做出决定；他呼吁委员会成员一视同仁地处理所有申请组织，并认为表决结果会使委员会继续保持与该组织的互动和对话，以打消不同成员的关切。
It was noted that the growth process in the LDCs, which was largely externally propelled, did not precipitate any progressive changes in the composition of gross domestic product (GDP), diversification of exports, reduction in commodity dependence, broad-based investment flow, substantial strengthening of trade-related infrastructure, and development of science, technological and innovation capability.
有人注意到，大体上由外部驱动的最不发达国家的增长进程，没有促使国内生产总值(内产值)的构成、出口产品的多样化、减少对初级商品的依赖、基础广泛的投资流动、涉贸基础设施的大幅增强、以及科学技术创新能力的发展方面发生任何渐进的变化。
来源：译问
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