| 词汇学习 |
[取代,推迟] be placed in or take the room of; replace; make obsolete; make void or useless by superior power | |
[超越] be or go beyond, as in degree or quality; exceed | |
[克服] overcome or conquer; climb; place something above; be above or on top of | |
[不必要的,多余的] being beyond what is required or sufficient |