挑战之一就是社会科学必须从理论走向技术，转变为直接用于人们改造客观世界的各种社会技术。
One of which is that social science must spread from theory to technique and be directly used to rebuild the objective world.
第四部分重点论述油画写生过程中的精神表达，从改造自己的主观世界和探索实践经验两部分做起。
The fourth part focuses on the process of oil painting the spirit of expression, from the transformation of their own subjective world and the two begin to explore practical experience.
我们从内心发出的共同认识和个人从辽阔的建设和改造世界。
We Shared from our heart and from vast personal knowledge of the construction and remodeling world.
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