- 二次: secondary; quadratic
- 分叉: forking; branching; ramifica ...
- 的: 4次方是 The fourth power of 2 i ...
- 一次分叉的: once furcate
- 分叉的: biforked; bifurcated channel; bifurcus; bifurous; divaricate; forficate; forky; furcal; furcate
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