Definition: the quality or state of being tough Level: C2
她以坚韧不拔著称。
She has a reputation for ___toughness.
他们无法面对竞争的残酷性。
They can't face the ___toughness of the competition.
我们必须使自己适应生活的艰辛。
We must accustom ourselves to the ___toughness of life.
