它们不能够进行扩展并且是固定大小的。

They are unscalable and fixed in size.

youdao

这是因为COBOL只支持固定大小的字符串。

This is because COBOL only supports fixed size strings.

youdao

一个分页就是一个固定大小的数据块。

A page is a fixed-size block of data.

youdao

To get any location in memory, to get to any value of the list, I simply have to say which element do I want to get, I know that these things are stored in a particular size multiply that index by 4, add it to start, and then it's in a constant amount of time I can go to that location and get out the cell.

取得列表中的任何一个值,简单说来，想要取得列表中的任何元素,我知道这些元素存在特定的大小中,把下标乘以4，加到start上,然后定位到内存单元，并取出值就是固定的时间了,好的，如果元素以固定大小存储。

麻省理工公开课 - 计算机科学及编程导论课程节选