upskilling

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++up·skill·ing /ˈʌpˌskɪlɪŋ/ noun [uncountable]  improving the skills of workers, usually through training, so that they will be better at their jobs 〔通常指通过培训实现的〕技能的提高

up·skill·ing nounChineseSyllable  

upskilling
up‧skill‧ing /ˈʌpˌskɪlɪŋ/ noun [uncountable]
improving the skills of workers, usually through training, so that they will be better at their jobs