zeroth period

例句：

1. 1. The zeroth period of the experiment was crucial for its success.
   实验的零期对于其成功至关重要。
2. 2. During the zeroth period, the team worked tirelessly to achieve their goal.
   在零期，团队努力工作以实现他们的目标。
3. 3. The zeroth period marked the beginning of a new era in history.
   零期标志着历史新纪元的开始。