全神贯注

例句：

1. 1. She was so absorbed in her work that she didn't notice the clock ticking away.
   她全神贯注于工作，以至于没有注意到时钟的滴答声。
2. 2. The student was so focused on his task that he didn't realize he had been working forhours.
   这位学生全神贯注于他的任务，以至于他没意识到他已经工作了几个小时。
3. 3. During the presentation, the speaker was fully immersed in his topic, making it seem like he was speakingdirectly to the audience.
   在演讲过程中，演讲者完全沉浸在他的话题中，使得听众感觉他像是直接对着他们说话。