fixed structure

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 weather in this region is quite fixed.
   这个地区的天气相当稳定。
3. 3.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。