畅通的

Bridge is the hinge of the highway.The carrying and transitable capability of bridge is the key to keep the line smooth.

桥梁是确保交通线路畅通的咽喉，其承载能力和通行能力是沟通全线的关键。

To solving the skin hydropenia problem, besides the traditional water supplement and moistening measures, the unimpeded transportation of water supply channel is also a key point.

解决肌肤缺水问题，除了传意义上补水、保湿之外，输水通道的畅通更是关键所在。