来自拉丁语onus,责任，重担，来自PIE*en,担子，可能来自PIE*an,在上面，词源同on.

1. The onus is on employers to follow health and safety laws.

雇主有义务遵行健康安全法。

2. The onus is on government departments to show cause why information cannot be disclosed.

政府部门有责任说明不能把信息公开的理由.

3. The onus is on the shopkeeper to provide goods which live up to the quality of their description.

店主有义务提供质量与其描述相符的商品。

4. The onus of proof is reversed in libel actions and placed firmly on the defender.

在诽谤诉讼中，举证责任反过来由辩方全权承担。

5. The onus of proof lies with you.

你有责任提供证据.