The exciting forces will change when the technical states of diesel engine change. So to measure the body vibration can felicitate the monitoring of diesel engine technical states of.(在柴油机使用过程中技术状态的改变将导致激振力发生不同的变化，因此测量机体激振信号有利于对柴油机技术状态进行监测。)
I felicitate the day I found you.(我庆幸我找到你的那一天。)
I ever felicitate myself secretly that I won't make impertinent remarks or be hurt by them.(我曾经暗自庆幸，我不会出言不逊也不会为言语所伤。)
Once being eager to stay with someone forever, later, we would felicitate ourselves on leaving him/her. During those transient days, we thought we loved him/her deeply.(曾经渴望与一个人长相厮守，后来，多么庆幸自己离开了?曾几何时，在一段短暂的时光里，我们以为自己深深的爱着的一个人。)
