tā / yí / gè / rén / zuò / zài / jiǎo / luò / lǐ / yín / chén / shuí / yě / bù / zhī / dào / tā / zài / xiǎng / shén / me

他一个人坐在角落里吟沉，谁也不知道他在想什么。

He sat alone in the corner, muttering to himself, and no one knew what he was thinking.