This change began with slavery laws.

转变是从禁止奴隶制法律开始的。

They, along with a medic who helped them, are the first people to be convicted of organ trafficking under modern slavery laws.

他们和一名帮助他们的医生，是第一批在英国新通过的现代奴役法案下被判犯有器官贩运罪的人。