curl oneself up的用法和样例：
- Crack oneself up has fine hand, rejuvenescent force is boundless.
- There is no need to load oneself up with unnecessary facts for the examination.
- Pulling oneself up by the bootstraps may help one gain self-confidence.
- Be backward and have no urge to make progress; be resigned to one's backwardness; give oneself up as hopeless.
- The result is likely to be that one shuts oneself up in sulkiness, if not morbidity--a sterile move.