Definition
To cause someone to feel confused, upset, or temporarily disoriented by saying or doing something unexpected.
使人失去制御；使人感到困惑
The sudden question threw him off balance for a moment.
突然的问题让他一下子失去了平衡。
Her husband's sudden request for a divorce threw her off balance.
她丈夫突然提出离婚的要求让她一时不知所措。
The bad news completely threw him off balance, catching him unprepared.
这个坏消息完全让他失去了平衡，措手不及。