Word: 不可或缺 (bùkěhuòquē) 不可或缺 dictionary entry bùkěhuòquē necessary; must have Full dictionary entry for 不可或缺 Example sentences using 不可或缺 2 sentences, showing page 1 of 1. 学习时努力是不可或缺的。 Xuéxí shí nǔlì shì bùkěhuòquē de. Effort is essential to studying. 空气是生命中不可或缺的。 Kōngqì shì shēngmìng zhōng bùkěhuòquē de. Air is indispensable to life.