improvised painting

例句：

1. 1. The engineer made the designmore efficient by improvising a newsystem.
   工程师通过改进系统使设计更加高效。
2. 2. The team improvised a solutionto the problem on the spot.
   团队在现场临时解决了这个问题。
3. 3. The artist improviseda painting based on the sketch.
   艺术家根据草图创作了一幅画。