1. Environment officials and experts have been repeatedly calling for heftier fines on illegal polluters.
2. Nine cities reported property price increases heftier than 9 per cent last year, including Shanghai and Nanjing of East China's Jiangsu Province.
3. heftier的反义词
3. Those using the information can also face heftier sentences of up to 10 years, depending on how the information is used.