non-periodical profit and loss

例句：

1. 1.The non-periodical nature of the project makes it difficult to predict its outcome.
   该项目的非周期性特性使得难以预测其结果。
2. 2. The non-periodical growth pattern of the population is a concern for policymakers.
   人口的非周期性增长模式是政策制定者关注的问题。
3. 3.The non-periodical nature of the data means that it cannot be easily summarized in a concise manner.
   数据的非周期性性质意味着它不能被轻易地总结成简明扼要的形式。