lì / shǐ / lǎo / shī / jiě / shì / le / wù / chén / nián / zài / liù / shí / nián / zhōu / qī / zhōng / de / wèi / zhi历史老师解释了戊辰年在六十年周期中的位置。The history teacher explained the position of the Wuchen year in the sixty-year cycle.