事实上，还有另一种朋友，他虽然很长一段时间没有和我们在一起，但却会在某个时刻充满我们的心灵。
In fact, there is another type of friend—one that has not been with us for a long period of time, but fills our mind at some moment.
虽然很长一段时间里，该信件没有受到专业博物馆员工的维护，但是其状况良好。
The letter is in fairly good condition, in spite of being out of the care of trained museum staff for so long.
这份报告虽然很长，但不切要领，我看不懂。
Although the report is very long, it is beside the point and beyond my comprehension.
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