Alter periodogram

例句：

1. 1. The weather forecast has been altered due to the sudden storm.
   由于突如其来的暴风雨，天气预报已经改变了。
2. 2. He decided to alter his plans to fit the new schedule.
   他决定调整他的计划以适应新的时间表。
3. 3. The company has decided to alter its policy on employee benefits.
   该公司已决定修改其员工福利政策。