This is the age of~點解

This is the age of ...
age 解「時代」，不作歲數、年齡解。

以前一個時代是幾百年，例如石器時代 the Stone Age 到鐵氣時代 the Iron Age。隨著社會進步，科技日新月異，每個時代越來越短，隨著社會多樣化，同一時期也可以有幾個時代的稱號。

六十年代有太空競賽，那個時候可以稱為太空時代。
The sixties was the age of aerospace.
六十年代音樂界有 Beatles, Elvis Presley，Rolling Stones，也可以叫樂與怒時代。
The sixties was the age of rock 'n' roll.
The sixties was the age of the hippies.

The nineties was the age of personal computers.
The 2000s was the age of the internet.
The 2010s is the age of smart phones.

現在資訊爆炸，你可以叫現今是資訊年代。
This is the age of information.

總之，一般人認為某樣事可以代表那般時間，便可稱為一個時代，
This is the age of ...

meaning: 這是the歲數of

用來說某某事物的歲數

e.g. This is the age of me.
這是我的歲數.

e.g. This is the age of this book.
這是書的年齡.

The meaning is great or long period of human history;
When the period comes to a golden age,,then golden age;
eg.:-We've been waiting for the golden age to get married!