1、His math grades have improved by leaps and bounds since he got a tutor
（自從請(qǐng)了家教以后，他的數(shù)學(xué)成績(jī)就突飛猛進(jìn)。）

2、Swedish industrial front is developing by leaps and bounds in the late years.
瑞典的工業(yè)近年來(lái)出現(xiàn)了躍進(jìn)的局面。

3、Doris' French improved by leaps and bounds after she got a French boyfriend.
在交了一個(gè)法籍男友之后，桃樂(lè)絲的法語(yǔ)進(jìn)步神速。

by leaps and bounds翻譯