at the first jet

例句：

1. 1. At the first jet, we need to make a decision about what to do next.
   首先，我们需要决定下一步该怎么做。
2. 2. At the first jet, I realized that I had made a mistake in my plan.
   首先，我意识到我在计划中犯了一个错误。
3. 3. At the first jet, we should take a deep breath and try to calm down.
   首先，我们应该深呼吸并试图冷静下来。