From 1957 to 1962, symphonic creation became even brisker.是什么意思？

From 1957 to 1962, symphonic creation became even brisker.

1957年一1962年间, 交响音乐创作呈现出更为活跃的局面.

from

prep. （表示时间）从…，（表示原因）因为，（表示来源）来自…，（表示分离）与…分离[隔开]；

例句
...an abortive attempt to prevent the current President from taking office.
企图阻止现任总统连任的失败尝试

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

symphonic

adj. 交响乐的；

例句
Symphonies 103 and 104 stand as perfect examples of early symphonic construction...
第103和104号交响曲是早期交响乐结构的典型代表。

creation

n. 制造，创造，创造物，产物，（尤指<圣经>所述由上帝）创造天地，宇宙，（爵位等的）封授；

例句
Alongside the Job Creation Programme they launched a Work Experience Programme.
在开展创造就业项目的同时，他们还启动了工作经历项目。

became

v. 变为，成为（ become的过去式 ）；

例句
It became very clear that the incident was not just an aberration, it was not just a single incident.
事实已经很清楚，这件事不是偶发的，它并不是一起孤立的事件。

even

adv. 甚至，更加， 即使，恰巧在…时候；adj. 公平的，平坦的， 偶数的，平均的；vt. 使平坦，使相等；vi. 变平，成为相等；

例句
In his later life he became even more absent-minded.
他晚年变得愈加健忘了。

brisker

adj. 快的( brisk的比较级 )，轻快的，爽快而清新的，兴隆的；

例句
The market is becoming brisker day by day.
市场日趋繁荣.