4.词语解释：
[1].(A) intensification：(加强)to make intense or moreintensive : STRENGTHEN
[2].(B) authorization：(授权)the act of authorizing
[3].(C) centralization：(集中)to concentrate by placingpower and authority in a center or central organization
[4].(D) improvisation：(即席创作)the act or art ofimprovising
[5].(E) elimination：(消除)the act, process, or an instance of eliminating ordischarging
