Diào / chá / rén / yuán / huā / le / liǎng / zhōu / zhōng / yú / mō / qīng / chǔ / le / shì / qing / de / lái / lóng / qù / mài

调查人员花了两周，终于摸清楚了事情的来龙去脉。

The investigators spent two weeks finally figuring out the whole story.