golden age
noun [ C usually singular ] uk/ˌɡəʊl.dən ˈeɪdʒ/ us/ˌɡoʊl.dən ˈeɪdʒ/
（有时指想象中的）黄金时代，鼎盛时期
a period of time, sometimes imaginary, when everyone was happy, or when a particular art, business, etc. was very successful
Adults often look back on their childhood as a golden age. 成年人常常追忆童年时代，认为那是他们最美好的岁月。
She was an actress from the golden age of the cinema. 她是在电影业鼎盛时期脱颖而出的女演员。