Zài / yán / jiū / lǎo / wén / xiàn / shí / wǒ / xū / yào / bǎ / Wēi / mǎ / pīn / fǎ / zhuǎn / huàn / chéng / Hàn / yǔ / pīn / yīn

在研究老文献时，我需要把威玛拼法转换成汉语拼音。

When studying old documents, I need to convert the Wade-Giles system into Hanyu Pinyin.