We felt an intangible presence in the conference room.

我们感到会议里有一种难以捉摸的东西。

The office boy tried to dissipate the smoke by opening a window of the meeting room.

"勤杂工打开窗子,试图使会议内烟消散。"

A hush fell over the meeting-room.

会议里一下子安静了下来。