不安定地 meaning in Chinese

changeably
unsteadily

I distinguished mr heathcliff s step , restlessly measuring the floor , and he frequently broke the silence by a deep inspiration , resembling a groan
我可以听到希刺克厉夫先生的脚步不安定地在地板上踱着，他常常深深地出一声气，像是呻吟似的，打破了寂静。
His handsome features glowed with pleasure , and his eyes kept impatiently wandering from the page to a small white hand over his shoulder , which recalled him by a smart slap on the cheek , whenever its owner detected such signs of inattention
他的漂亮的面貌因愉快而焕发光彩，他的眼睛总是不安定地从书页上溜到他肩头上的一只白白的小手上，但是一旦被那人发现他这种不专心的样子，就让这只手在他脸上很灵敏地拍一下。