GbEng
我佩服他的坚韧不拔的勇气。 I admire him for his grim courage.
软骨性的有软骨组织结构的;坚固、坚韧而又有弹性的 Having the texture of cartilage; firm and tough, yet flexible.
一种坚韧的全天候织物 A tough all-weather fabric.
她有非凡的自立的精神和坚韧不拔的精神。 She have an unusual degree of self-reliance and mental toughness.