With the new dominance of computer games, outdoor activities have declined among young people.

dominance 是名词，来自形容词 dominant（占优势的、主导的），词根是拉丁语 dominari（统治、支配）。dominance 指"支配地位、优势地位"，表示某事物在某个领域具有控制性或主导性影响。