由于客户使用的数据量各不相同而且大小不定，所以表空间变化很大，会影响数据大小调整和规划方面的考虑。
Because customers use different as well as unexpected amounts of data, table space sizes can vary significantly, affecting database sizing and planning considerations.
假设该消息由信息头部分和一些条目组成，这些条目大小相同，但数量不定。
I will assume that the message consists of a header part and a variable number of items that have the same size.
她把衣服试穿了，发现大小正合适。（动词不定式）
She fitted the clothes on and found them to be the exact size.
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