n.坚固，坚牢，坚定

The oak tree has an impressive firmness, its trunk unyielding to the strongest winds.
橡树有着令人赞叹的坚实，其树干在最强劲的风中也不屈服。
She maintained a firmness in her voice, despite the emotional turmoil within.
她的声音坚定，尽管内心充满情感的波澜。
A good leader possesses a firmness of purpose that inspires confidence in their team.
优秀的领导者拥有坚定的目标，这使他们的团队充满信心。
The mattress offers perfect firmness for back sleepers, ensuring a comfortable night's rest.
这款床垫对背部睡眠者来说提供了完美的硬度，确保了舒适的夜晚睡眠。
His handshake was firm, a testament to his strong character.
他的握手坚定有力，显示了他的坚强个性。
The construction material is known for its remarkable firmness and durability.
这种建筑材料以其出色的坚固性和耐久性而闻名。
She stood her ground with a firmness that belied her age.
她站得稳如磐石，坚韧的态度超越了她的年纪。
The gardener adjusted the soil's firmness to ensure proper root development.
园丁调整土壤的硬度以确保根系的正常发育。
The athlete's firmness in maintaining a strict training regimen contributed to their success.
运动员坚持严格的训练计划的坚定性是他们成功的关键。
The policy maker displayed a firmness in implementing economic reforms, regardless of opposition.
政策制定者在执行经济改革时表现出坚定的决心，不为反对意见所动摇。