pro bono publico
/ˈprəʊˈbəʊnəʊˈpʌblɪkəʊ/adverb & adjective
1- for the public good为了公共利益（的）：
as adv. the burden they carried pro bono publico.他们为公共利益所承受的负担。
1.1
- （一般作pro bono）chiefly N. Amer. denoting work undertaken for the public good without charge, especially legal work for a client on low income〈主北美〉为公众利益无偿工作（尤指为低收入者提供法律援助）：
as adv. the attorneys are representing him pro bono这些律师免费做他的代理人
as adj. providing pro bono legal services.提供免费的法律服务。
词源
Latin.