in course of表示在.常常表示主动
in the course of表示在.正在进行的期间,常常表示被动
In course of sinking the well-shaft they came upon a deposit of a very rare mineral.
他们在凿井的过程中,发现了一处稀有矿物矿床.
Tom called me in the course of our conversation.
在我们谈话时,汤姆打电话给我.