存取子1并非自动存取子，它可撷取包含大型资料的资料行。
Accessor 1 is not an automatic accessor; it retrieves the column with large data.
在包含大型二进制文件的系统中，时间因素很难影响这种方法成为最佳解决方案。
In systems with large binaries, time would have to be of very little concern for this to be the best solution.
第二个存取子只可以撷取包含大型资料的资料行，不过它并不会自动地从这些资料行撷取资料。
The second accessor retrieves only the column containing large data, but it does not retrieve data from this column automatically.
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