?增添与改良

... addition 增添(指固定资产) addition and betterment 增添与改良 additional mark on 再加价 ...

?增加及改良

... addition agent 掺和剂; 加成剂; 添加剂; 添日剂 addition and betterment 增加及改良; 增添与改良 addition and subtraction 加减法 ...