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(串行 (2, 3, 1, 4), (2, 3 (<>), 1 (<>), 4)), 平行 - Coggle Diagram
串行
2
3
1
<>
<>
<>
3
4
2
1
4
2
3
<>
3
1
<>
1
<>
2
4
4
平行