As a mandatary, he must act in the best interest of the principal.

作为受托人，他必须以委托人的最佳利益为重。

The mandatary signed the contract on behalf of the company.

受托人代表公司签署了合同。

The mandatary is responsible for managing the client's assets.

受托人负责管理客户的资产。

She trusted the mandatary to handle all her financial matters.

她信任这位受托人处理她所有的财务事务。

The court appointed a mandatary to oversee the legal proceedings.

法院指定了一名受托人来监督法律程序。