他鉤絲上的浮子在水面上下急動(dòng).The cork on his fishing - line was bobbing up and down on the water.三維相空間是混沌和急動(dòng)度之間的重要聯(lián)系紐帶.Three - dimensional phase space is an important relation link between chaos and jerk.急動(dòng),上下晃動(dòng)上下左右地?cái)[動(dòng)或推動(dòng) ( 某物 )To bob...