另外，针对单一主题的探讨代表著在未来攻读博士的几年之内，你只会在范围狭小的主题上做深入研究。

You will know about your research than anyone at your school. By one we mean that by the last couple years of your Ph. D. , you will typically be working on only one narrow problem.

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博物馆在储存文艺复兴时期的油画时，要遵循严格控制周围温度和湿度的标准，把变化限制在狭小的范围内。

When storing Renaissance oil paintings, museums conform to standards that call for careful control of the surrounding temperature and humidity, with variations confined within narrow margins.

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他们不在窗口中买东西，只是通过搜索引擎来在很狭小的范围里搜索东西。

They don't "window shop". They use search engines to limit their searches to a very narrow field.

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