这是长沙水运通江达海的重要通道。

This is the Changsha Water Tongjiang Dahai important channel.

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龙陵是历史上著名的“南方丝绸之路”的重要通道。

Longling was an important passage of the famous "South Silk Route" in history.

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阳台不光是室内空气流通的一大重要通道，也是采集阳光的地方。

The balcony is not only the indoor air circulation, one of the great important channel, is collecting sunlight.

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The ones that are most important in physiology are ones that only allow ions to go through: sodium, potassium, chloride, calcium, bicarbonate.

在生理学上这种,只能允许某种离子通过的通道十分重要,这些离子包括钠离子,钾离子,氯离子,钙离子和碳酸氢根离子

耶鲁公开课 - 生物医学工程探索课程节选