We took it as read that he must have been a KGB agent
我们完全相信他曾经是一名克格勃特工。
There have been some problems but basically it's a good system.
虽然出现过一些问题,但这基本上仍不失为一个好系统。
His family have been a very positive influence on him.
他的`家庭对他有十分良好的影响。
There have been many changes in recent years.
近几年发生了许多变化。