tā / dì / yī / cì / chǔ / lǐ / zhè / me / fán / nán / de / àn / jiàn / huā / le / hěn / cháng / shí / jiān / cái / lǐ / qīng / tóu / xù

他第一次处理这么繁难的案件，花了很长时间才理清头绪。

It was his first time handling such a complicated and difficult case, and it took him a long time to sort it out.