zhè / běn / zhéxué / zhùzuò / de / táng'ào / shēnsuì / xūyào / fǎnfù / yándú / cáinéng / lǐnghuì

这本哲学著作的堂奥深邃，需要反复研读才能领会。

The profundity of this philosophical work is such that it requires repeated study to be understood.