n.搖擺遊移不定, 躊躇, 不果斷
vacillation n.猶豫【類】impetuous:vacillation[hesitation]＝bumptious:humbleness沖動的不猶豫＝傲慢的不謙遜【反】motionless balance ( 靜態平衡 ) ；tenacity ( n.頑固 ) ；pertinacity ( n.頑固；執著 ) ；equipoise ( n.平衡 ) ；impetuosity ( n.激烈；魯莽 )
