过去总是在现在中存在。

Economic policies should be evaluated based on their real-world impact.

Financial practitioners should adhere to professional ethics and maintain financial stability.

The beauty of a molecule is in its structure and its story.

如今人们对每样东西的价格了如指掌，对它们的价值却一无所知。

生命的历史由A、T、C、G书写。