1)3-manifolds,3-流形2)an amalgamation of two 3-manifolds,3-流形的融合3)NO_3~-,NO~3~-4)NO~-_3,NO~-_35)As~(3+),As~（3+）6)3×3×3 lemma,3×3×3引理
用法例句
The additivity of the relative genus of 3-manifolds;
3-流形相对亏格的可加性(英文)
This article extends snake lemma to two snakes lermma,and entends 3×3 lemma to 3×n lemma 3×3×3 lemma,Moreover,it studies some problems on exact plane,exact cube as well as problems on cubic commtative diagrams.
