母校 one's old school; Alma Mater;
eg:
1 我依然眷恋着母校。
I still have affection for my old school
2 他对自己的母校有着深厚的感情。
He has fond feelings for his Alma Mater.
3 他们团结一致来支持母校。
They club together to support their mother school.
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