EXTabbr.扩展（=extension）abbr.外面的；外部的（=exterior）abbr.额外的（=extra）extrolite爱克斯特罗莱特炸药

1. Meanwhile,the differences between the conditional extremum and unconditional extremum in concept and evaluation are pointed.
   同时还指出了条件极值和无条件极值在概念上及求法上的一些区别。