zài / méiyǒu / qiānbǐ / de / niándài / xuéshēng / yòng / shíbǐ / zài / shíbǎn / shàng / xiězì在没有铅笔的年代,学生用石笔在石板上写字。In the era without pencils, students used slate pencils to write on slates.