However, problems still exist in researching work such as the unbalanced research distribution, improper methods and theories, historical data collection.

但其研究仍存在诸多不足，表现为研究状况严重不平衡、研究方法与理论把握以及史料收集与整理方面均存在很多问题。

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One strategy is to present a collection of historical data from similar projects along with an estimate.

一个策略是把评估和类似项目的历史数据集合一起呈现。

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Second, the data collection form is the historical record of the multitude of decisions (and changes to decisions) that occur throughout the review process.

第二，数据收集表格是贯穿于回顾全过程的大量决策(和决策变化)的历史记录。

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Clark amasses an extraordinary collection of historical data to explain why the Industrial Revolution was born in western Europe, not Africa or India.

FORBES: Wealth and Poverty