The problem was reading the stream length.
问题是阅读流容积长度。
A black stream of ink flowed across the length of the room.
一股黑色的墨水流遍了整个房间。
The other important item to follow when using a stream is that you need to first open the stream as appropriate and determine its length.
使用流时要遵循的另一条重要事项是需要首先正确地打开流并确定其长度。
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