她基于原则不穿皮草。

She doesn't wear fur ___on ___principle.

他们，基于原则从不喝酒，那天晚上却喝醉了。

They, who ___on ___principle never drank alcohol, got drunk that night.

这位律师基于原则拒绝了此案，因为它与她的价值观冲突。

The lawyer declined the case ___on ___principle because it conflicted with her values.