随着二战后婴儿潮时期出生的人进入高中，大型学校承诺提高经济效率，提供更多课程选择，当然，还提供更好的足球队。
As baby boomers came of high-school age, big schools promised economic efficiency, a greater choice of courses, and, of course, better football teams.
经济组织产生就是对交易费用的节约，以提高经济效率。
The organization can save the transaction cost to improve the productivity efficiency.
改进技术标准会提高经济效率，一著名经济学家在北京基础科学和科技日报。
Improved technological standard will improve economic efficiency according to a noted economist writing in the Beijing-based Science and Techonology Daily.
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