IBM internal training materials, on the very place, together with exercises, the entry is a good book for beginners
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You can practice the exercises together, have conversations together (in English! ), and, as you study English together, help each other with exercises you may not understand.
你们可以一起做练习，一起聊天（当然要用英语！）。你们一起学的时候可以互相帮助，解决练习中的疑惑。
These have been retained within the structure of this edition together with the practice exercises which formed part of most chapters.
这个新版本的安排除了仍然保留这些要点之外，还保留了多数章节中的大量练习。
As in the first edition, each chapter contains a presentation of its topic in "lecture-book" format together with objectives, an outline, key formulae, practice exercises, and a test.
如同在初版里，每章以“演讲书”形式以及目标包含它的题目的赠送，一个概要，关键公式，实践练习和一次试验。
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