n.韧性;坚韧;刚性;健壮性;
例句:
She had an unusual degree of self-reliance and mental toughness.
她有非凡的 自立 的精神和坚韧不拔的精神.
All this toughness does not sit well with everyone.
所有这种强硬的做法并非人人都能接受.
He liked their toughness and their loyalty.
他喜欢他们的坚韧不拔和忠贞不二.