问题描述：
英语翻译
The period covered in the present volume,therefore,is some two and a half years of European history,and I have tried to extend its scope sufficiently to include brief excursions into the contemporary history of certain States where internal events have borne directly upon the working of the working of the central theme.
The period covered in the present volume,therefore,is some two and a half years of European history,and I have tried to extend its scope sufficiently to include brief excursions into the contemporary history of certain States where internal events have borne directly upon the working of the working of the central theme.
问题解答：
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