youdao

The true source of youth is curiosity.

年轻的真正源泉是好奇心。

youdao

The true source of cheerfulness is benevolence.

快乐的真正源泉是行善。

youdao

Holbrooke says the long-held notion that Afghanistan's illicit opium trade is the main source of funding for the insurgency is simply not true.

VOA: standard.2009.06.15

This small sheikhdom of some 906, 000 people demonstrates anew that the true source of wealth is not "natural resources" but human ingenuity.

FORBES: PROSPERING THE LASTING WAY

Hiding the true source of a contribution is a violation of law.

CNN: FEC Levies A Record Penalty

The principal objection to the act is that it will create uncertainty, but the current tax code is the true source of uncertainty.

FORBES: Fact and Comment