由于缺少消息集定义（消息集定义包含在转换到位流时应该如何呈现消息的详细信息），因此需要将数据包含在逻辑树中。

The lack of message set definitions, which contain details of how messages should be rendered when converted to a bitstream, require that the data be contained in the logical tree.

youdao

但是，如果缺少硬件资源，无法扩展Hadoop集群以满足自己的需要，那么应该怎么办？

But what if you lack the hardware resources to scale your Hadoop cluster for your specific needs?

youdao