该短语通常作为方式状语，修饰表示“增长、进步、变化”的动词（如 increase/grow/improve/develop/rise 等），说明动作的“快速且大幅”的特征。
She has been practicing piano every day, so her playing skills have improved by leaps and bounds.
（她每天练钢琴，所以演奏技巧突飞猛进。）
Since starting the language exchange program, my Spanish has come along by leaps and bounds.
（自从参加语言交换项目，我的西班牙语进步飞速。）
The company’s sales have grown by leaps and bounds since launching the new smartphone.
（自推出新智能手机以来，公司的销售额急剧增长。）
The population of the city has increased by leaps and bounds over the past decade.
（过去十年，这座城市的人口飞速增长。）
With the new policy, technological innovation in the industry is progressing by leaps and bounds.
（有了新政策，该行业的技术创新正突飞猛进。）
His confidence has grown by leaps and bounds since he started public speaking.
（自从开始公开演讲，他的自信心急剧提升。）
修饰对象：通常用于正向或中性的“增长/进步”，但也可用于负面的“激增”（如问题、投诉等的快速增加）：
The number of customer complaints has risen by leaps and bounds since the price hike.
（自涨价以来，客户投诉量急剧上升。）
语法位置：一般放在动词或动词短语之后（如 improve by leaps and bounds），也可放在句末：
Her English has gotten better—by leaps and bounds!
"by leaps and bounds" 是一个生动的习语，比普通的“quickly/rapidly”更强调“跳跃式、大幅度”的快速变化，适用于口语和书面语，是描述“突飞猛进”的高频表达。