“实验者”的英语可以翻译为：experimenter ...

实验者已经成功控制了心跳的速度和频率。Experimenters have succeeded in controlling the rate and regularity of the heartbeat.当实验者在自己身上重复测试时，他们观察到了完全相反的效果。When the experimenters repeated the tests on themselves, they observed an exactly oppos...