I've written about a range of habits related to learning, but one I have not yet covered is concentration - perhaps because I find it among the hardest of habits to truly master.

我曾撰文谈到过一系列与学习有关的习惯，但有一个方面是从来没有涉及到的，这就是集中注意力的问题，个中原因可能是本人觉得这是最难于养成的习惯之一吧。

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We believe the modern software developer must master a range of languages and tools.

我们相信现代软件开发者必须掌握一系列的语言和工具。

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These range from the required RTRT master plan up to the use of definitions.

这些建议从所需的RTRT主计划直到定义的使用，范围很宽。

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Some, such as the Philips Master LED range, promise energy savings of up to 80% and a working life of 45, 000 hours.

ECONOMIST: Lighting: A brilliant new approach | The

Bakhshi music is passed on through traditional master-pupil training, which is restricted to male family members or neighbours, or modern methods, in which a master trains a wide range of students of both genders from diverse backgrounds.

UNESCO: Culture

Unlike more ambitious collectors such as Baron Thyssen-Bornemisza, whose broad range of master-paintings is housed at the imposing Villahermosa Palace in Madrid, Mr Beyeler does not claim to have mounted an exhaustive panorama that takes in every movement in 20th-century art.

ECONOMIST: Another way to house art