清华大学在抗战胜利后的1946年由昆明迁回北平。

After the War of Resistance Against Japan, Tsinghua University was removed from Kunming to Beiping in 1946.

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抗战胜利后，他历尽千辛万苦回到祖国，在艰难中为新中国开创了力学科学教育体系。

After the war against Japan, he made an arduous journey back to China and created an educational system in mechanical science in hardships.

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抗战胜利后，他们进攻解放区首先攻的就是这个大门，而我们守这个大门的力量并不强。

After the victory over Japan, their first attack on the liberated areas was unleashed at this same gateway, but we did not have many troops to guard it.

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