1. 坚信,确信:be suited to 适合于 | be sure of 坚信,确信 | be surprised at 对...感到惊奇
2. 确信:一般的 in general | 确信 be sure of | 习惯于 become accustomed to
3. 深信;确信:145. be sure 肯定;确信 | 146. be sure of 深信;确信 | 147. be sure that 确信
4. 对......很确信:19.develop plants 开发出植物 | 20.be sure of 对......很确信 | 21.be sure to do sth. 对做某事有把握