It was a sign of the times.

那是这个时代的典型特征.

In a sign of the times, the National Debt Clock in New York has run out of digits.

在时代的广告牌上，纽约国家债务钟上的数字不够用了。

The research of deep ecology is a sign of the times which means the development of modern environment movement, especially the ecological ideology, has arrived at a new stage.

它的出现是人类现代环境运动，特别是生态意识形态由浅层向深层转换的时代标志。