firmer

例句：

1. 1.The new car is firmer than the old one.
   新车比旧车更坚固。
2. 2.The rope was firmer than I expected.
   这根绳子比我预期的更结实。
3. 3.The team worked together to make the project firmer.
   团队共同努力，使项目更加坚固。