In some cases, it’s not so much the treatment of the animals on set in the studio that has activists worried; it’s the off-set training and living conditions that are raising concerns. And there are questions about the films made outside the States, which sometimes are not monitored as closely as productions filmed in the States.

上段摘自高考英语2020年全国卷Ⅲ的阅读理解（B），不太理解其中 set-off 的意思。

查词典：off-set  vt. 抵消；弥补；补偿  adj. 胶印的

但感觉词典上的解释对 set-off 的解释行不通，对吧！