zhè běn / jiàocái / qùnián / zàibǎn / hòu / bǔchōng / le / xǔduō / zuìxīn / de / yánjiū / zīliào

这本教材去年再版后，补充了许多最新的研究资料。

After this textbook was reprinted last year, many up-to-date research materials were added.