在创建一个新的字符串时，我们分配一块动态的缓冲区来保存它所包含的文本。
For a new string we allocate a dynamic buffer to hold the text.
我知道这样的错误可能上升如果不妥善分配内存缓冲区。
I know such error may rise if memory is not allocated properly for either buffers.
单元体可以认为是已经分配出去的内存区。
The body of the cell is the area of memory which is considered allocated.
单元体可以认为是已经分配出去的内存区。
The body of the cell is the area of memory which is considered allocated.
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