How to translate this sentence in Qt doc.

kytexzy

Tree models are often able to add child items containing new data to their underlying data stores, and will therefore behave more predictably as far as the user is concened.
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My translation is:
树模型通常可以加入含有新数据的孩子项目到它们的底层数据存储中，并且表现出的可预测性比用户想像的更好。