- free moving
- 畅行: pass impeded
- 的: 4次方是 The fourth power of 2 i ...
- 畅行交通: free-moving traffic
- 畅行无阻: can run in both directions unblockedly [unimpededly]; advance freely; pass unimpededly; go off without a hitch; meet no obstacle wherever one goes; have free access to; proceed without hindrance
- 畅行无阻的: checkless
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