rock-firm的用法和样例：
例句
用作形容词 (adj.)
- No tempest is capable of shattering his firm determination.
任何惊涛骇浪都不能动摇他坚如磐石的决心。 - Travis Dupree had shown during qualifying that he would have the speed to compete for the win, however everyone knew that Ryan would be rock solid when the race is on the line.
特拉维斯杜普雷显示在排位赛中，他本来的速度竞争的胜利，但是每个人都知道，瑞安将稳如磐石的比赛时，上线。 - But if a full-fledged America suffered a real defeat from a small communist half-country, how can the West hope to stand firm in the future?
但是如果羽翼丰满的美国在共产党控制着的半个越南承受了彻底的失败，西方世界又如何寄望在未来屹立不倒？
