skill upgrading

• 技术提升

skill upgrading的用法和样例：

例句

1. To enable the upgrading of technology of Taekwondo, the power of scientific and reasonable use of the understanding, is not the lack of conditions.
   若要使跆拳道的技术提升，则力的科学及合理使用法的了解，是不可欠缺的条件。