lì / shǐ / kè / shàng / lǎo / shī / jiè / shào / le / liú / qiú / xiāng / guān / de / dì / lǐ / míng / chēng历史课上,老师介绍了硫球相关的地理名称。In history class, the teacher introduced geographical names related to Liúqiú.