It is an excellent reference and textbook, albeit you may find it a bit dry and less inspirational than others at first, but you will eventually develop an appreciation of its teaching method.

这是一部杰出的参考书与课本，尽管一开始你可能会觉得它有些枯燥或是没那么有激情。但是最终你将喜欢它的教授方法。

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Access to the Internet costs more, but compare these fees with just one paper programming manual, engineering reference guide, or college textbook; the cost is absorbed in fewer than four books.

连入互联网的费用会多一些，但是与纸质的程序设计手册、工程参考指南或者大学教科书相比，这些费用可被不到四本书抵消。

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This seems to be the best reference on which to build a textbook, since it is a standard on the subject and covers what most U.S. history students study in high school and college.

编写一本教科书，这似乎是最好的参考书，因为它是这个主题的标准，而且覆盖了高中生和大学生所学的大多美国历史课。

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Check most of the third world and a medieval history textbook for reference.

ECONOMIST: Letters