And he's sitting there in front of the Haptic device, the force feedback system, and he's moving his pen towards the heart, and the heart is now beating in front of him, so he can see how the heart is beating.
他正在操作触感仪器，也就是力反馈系统， 他正在用笔触碰这颗心脏， 这颗心正在他面前跳动， 他可以清楚地看到心脏跳动的情况。