难以捉摸

1.We felt an intangible presence in the conference room.

我们感到会议室里有一种难以捉西。

2.In Iraq's case this was the Baath, or Renaissance, Party, a vehicle which he ultimately transformed, through terrifyingly capricious ruthlessness, into a fascistic tool for his own absolute control.

他无情令人发指，他冷酷叫人难以捉，复兴党因此成了他绝对操控法西斯工具。