Even 100 year old, it may be prolonged in a person's life, but comparing with the long river of history it is quite short.

就算100岁吧，在人的一生中可能是漫长的，但在历史的长河中也是相当短暂的。

youdao

Youth is the best part of the long river of life, everyone should take advantage of it.

青春是人生长河中最美好的一段，人人都要好好把握它。

youdao

A day, a month, a year or a century, in the long river of time, is nothing but a drop of water, a foam, a twinkling.

一天，一个月，一年，一个世纪，在世间的长河中都只能是一滴水，一朵浪花，一个瞬间。

youdao

Then he got up, found a long stick and walked up and down the river bank.

VOA: special.2010.06.26

"When was Mahatma Gandhi born, and how long is the Nile River?

VOA: special.2009.10.12

The 14km long River Wandle flows through south London, starting at Croydon it passes through Sutton and Merton before joining River Thames at Wandsworth.

BBC: NEWS | UK | England | London | Toxic spill in river kills fish

The temple elephant, Lakshmi, carefully lumbers down the long stairs to the river and blesses the pilgrims with a spray of water before receiving her morning bath.

BBC: Escape from Goa: Hampi and the ruins of Vijayanagara

No, what he cares about, what thrills him every time, is knowing that this is it, the beginning of the long-awaited day at the river, as agreed to by himself in advance.

NEWYORKER: Getting Closer