List 确实不是线程安全的，所以 cumsupDataP.Add(...)正在以不可预测的方式丢弃数据.

List<T> is indeed not thread safe, so cumsupDataP.Add(...) is dropping data in unpredictable ways.

将该行替换为:

ConcurrentBag<List<double>> cumsumDataP = new ConcurrentBag<List<double>>();

一切都会好起来的.请注意，ConcurrentBag 是无序，但这很好，因为无论如何您都无法预测线程的顺序;p

and it will all work. Note that ConcurrentBag<T> is unordered, but that is fine because you have no way of predicting the order from the threads anyway ;p