难度

这次考试的难度很大。

Zhè cì kǎoshì de nándù hěn dà.

The difficulty of this exam is high.

这个动作的难度系数是三点五。

Zhège dòngzuò de nándù xìshù shì sān diǎn wǔ.

The difficulty coefficient of this action is 3.5.

老师根据学生的水平调整了难度。

Lǎoshī gēnjù xuéshēng de shuǐpíng tiáozhěng le nándù.

The teacher adjusted the difficulty based on students' levels.