这部书主要讲的是冷战时期的苏美关系。
The book is primarily concerned with Soviet-American relations during the Cold War.
本章旨在讲述历史背景。
This chapter concerns itself with the historical background.
这些计算机彼此之间的一个主要差异涉及其储存信息的方式。
One major difference between these computers concerns the way in which they store information.
让我担心的是我们对事态的变化缺乏准备。
What concerns me is our lack of preparation for change.
你似乎不再在乎，这令我担忧。
It concerns me that you no longer seem to care.
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