by leaps and bounds  ^{very quickly}

• Swedish industrial front is developing by leaps and bounds in the late years.^{瑞典的工业近年来出现了跃进的局面。}
• The power industry developed by leaps and bounds.^{电力事业长足发展。}
• Our group of friends is enlarging by leaps and bounds.^{我们的朋友圈在飞速地扩大。}
• Her health is improving by leaps and bounds.