Both explanations were inexact.是什么意思？

Both explanations were inexact.

两种解释都不准确。

both

adj. 二者，两者都；pron. 二者；adv. 二者，二者都；conj. 不仅…而且…，…和…都；

例句
The gym can be used by both able-bodied and disabled people.
这家健身房健全和残障人士都可使用。

explanations

n. 解释，说明( explanation的名词复数 )，能说明某事缘由的言语、事实、情况等；

例句
You can reduce long explanations to simple charts or diagrams.
你可以把冗长的解释简化成一目了然的图表。

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。

inexact

adj. 不准确的，不精确的，不确切；

例句
Forecasting was an inexact science.
预报科学是门不准确的科学。