zhè xiē / jì zhèng / bù néng / zhí jiē / zhèng míng / tā / de / qīng bái / hái / xū yào / jìn yī bù / fēn xī

这些迹证不能直接证明他的清白，还需要进一步分析。

These traces cannot directly prove his innocence; further analysis is needed.