Vacillation is the cause of his failure.
優柔寡斷是他失敗的原因。
You are expected to answer the call with immediate actions and not with vacillation.
希望大家聞風而動，不要舉棋不定。
Exclusion of air creates a vacuum in the bottle.
瓶子里的空氣排除后就產生真空。
Vacuum cleaners work by suction.
真空吸塵器靠抽吸除塵。
This kind of decision cannot ever be made in a vacuum.
這種決定絕不能脫離實際。