自古

自古

"Since ancient times."

自古用于指代历史的悠久起始点

自古以来，中国以其丰富的文化为著称。

Since ancient times, China has been famous for its rich culture.

自古强调从过去到现在的普遍现象或真理

自古英雄出少年，这句谚语表明年轻人也可以卓越。

The idiom 'Self-evident, heroes emerge from youths' indicates that young people can also excel.

自古用于表述一个古今皆适用的道理

自古小人之心难测，因此需保持警惕。

Since ancient times, the minds of petty people are hard to predict, so one must remain cautious.