1. He was so cocksure of himself that he didn't even consider the possibility of failure.
他自以为是，以致于连失败的可能性都没有考虑到。

2. The new employee's cocksure attitude rubbed his colleagues the wrong way.
新员工自信过头的态度让他的同事们感到不舒服。

3. Don't be so cocksure about the outcome of the project - there are still many unknown variables.
不要对项目的结果如此自信 - 还有许多未知因素。

4. His cocksure demeanor may come off as arrogance to some people.
他的自信态度可能会让一些人觉得他很傲慢。

5. She was so cocksure of her abilities that she didn't bother preparing for the exam.
她对自己的能力如此自信，以至于根本没准备考试。

6. The politician's cocksure promises turned out to be empty rhetoric.
这位政治家自信的承诺最终证明是空洞的言辞。