老板交给他的任务实在太难，他急得仰屋兴叹，不知如何下手。
The task the boss gave him was really too difficult; he was so anxious that he stared at the ceiling in despair, not knowing where to start.
The task the boss gave him was really too difficult; he was so anxious that he stared at the ceiling in despair, not knowing where to start.