性格溫馴的英文表達是 "gentle temperament" 或 "docile nature"。這兩個短語都可以用來描述一個人或動物性格溫和、容易相處的特點。例如，"She has a gentle temperament, which makes her very approachable." 或者 "The dog is known for its docile nature and gets along well with children."