wǒ / men / xū / yào / nòng / qīng / zhè / jiàn / shì / de / lái / zōng / qù / jì / cái / néng / zuò / chū / jué / dìng

我们需要弄清这件事的来踪去迹才能做出决定

We need to understand the full story of this matter before making a decision.