雅思寫作高頻詞匯：改良

　　betterment[改良/改進(jìn)]/improvement

　　-eg: The betterment of the medical service is what the general public is looking for.;

　　compulsory education[義務(wù)教育]

　　-eg: 9-year compulsory education;

　　levy[征稅/強(qiáng)加于]/impose

　　-eg: levy income tax/tax on real-estate.