他的来历很神秘。
tāde láilì hěn shénmì 。
His background is very mysterious.
请告诉我这本书的来历。
qǐng gàosù wǒ zhè běn shū de láilì 。
Please tell me the origin of this book.
了解他的来历对我很重要。
liǎojiě tāde láilì duì wǒ hěn zhòngyào 。
Understanding his background is very important to me.