fixed barrier

例句：

1. 1. The fixed plan was to meet at the park tomorrow.
   原定计划是明天在公园见面。
2. 2. The team's strategy is fixed and cannot be changed easily.
   团队的策略已经确定，不容易改变。
3. 3. The weather forecast is fixed for the next few days.
   天气预报在接下来的几天是固定的。