Relatively minor modifications were required.是什么意思？

Relatively minor modifications were required.

只需稍作改动。

relatively

adv. 关系上地，相对地，比较地，较比；

例句
This basic utilitarian model gives a relatively unsophisticated account of human behaviour...
这个实用的基础模型较为简略地解释了人类的行为。

minor

adj. 较小的，少数的，小…，未成年的，[乐]小调的，小音阶的，（两同姓男孩中）年幼的；n. 未成年人，副修科目，小公司，[逻辑学]小前提；vi. [主美国英语]副修，选修，兼修；

例句
The houses were set afire but there were only minor injuries to seven personnel...
房子着火了，但是只有7位职员受轻伤。

modifications

n. 缓和( modification的名词复数 )，限制，更改，改变；

例句
There are several modifications of the dendritic design.
树枝状图样有几种变态.

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

required

adj. 必须的，<美>（学科）必修的；v. 要求( require的过去式和过去分词 )，需要，想要，命令；

例句
Further scans are required to confirm the diagnosis of an abnormality...
需要进一步扫描来确诊是否出现异常病变。