The main problem with non-public APIs is lack of documentation and stability.
非公共API的主要问题是缺少文档与可靠性。
For the moment, the lack of documentation is the biggest issue you will have to deal with.
目前，缺乏文档是不得不处理的最大的问题。
It suffers from a lack of documentation, so learning took more time than I would have liked.
由于它目前缺少文档，所以学习它花的时间比我期望的要多。
It suffers from a lack of documentation, so learning took more time than I would have liked.
由于它目前缺少文档，所以学习它花的时间比我期望的要多。
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