extemporaneously
adv. 无准备地，临时作成的
同义词
参考例子
1.In the performance also has the aria extemporaneously, also has the very good effect.
表演中还有即兴的唱段，也有很好的效果。
2.Electric piano extemporaneously performance, in modern music education teaching, but also is in a development a.
电子琴的即兴演奏，在现代音乐教育教学中，还处于一个发展和不完善的阶段。
3.On the contrary, each concert I can the homemade many stunner, some even be think extemporaneously in the stage and perform.
相反，每场演唱会我都会自创很多高难度动作，有的甚至是在舞台上即兴想到并演出的。
英文解释
adv.
1.without prior preparation
网络释义
extemporaneously
无准备地; 即席;