tā / yí / ge / rén / zuò / zài / chuāng / biān / zì / yǔ / hǎo / xiàng / zhèng / zài / sī / kǎo / yí / ge / nán / tí

他一个人坐在窗边自语，好像正在思考一个难题。

He sat by the window talking to himself as if he were thinking about a difficult problem.