改造厂房

modify a factory

改造低产田

improve low-yielding fields

改造了低洼易涝耕地几万亩

improved several thousand hectares of low-lying farmland liable to waterlogging

改造后的盐碱地年年丰收。

After improvement, the salty land produced bumper harvests every year.

改造世界

transform the world

改造世界观

transform one's outlook

用新思想改造青年

transform the youth with new ideas

改造国民经济

transform the national economy

思想改造

transformation of ideas

自我改造

self-transformation