He then measured the way that heat passed along the tubes and found that the flow was greatest towards the "low density" ends.

之后他测量了热通过碳管的方式并发现流动在倾向低密度的方向最大。

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First is free flow in which the density of traffic is low enough to allow vehicles to travel at the maximum speed allowed.

首先是畅通无阻，交通密度足够低，使得车辆能以最高时速行驶。

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The results show that the cell potential along fuel flow change little at high current density when low fuel or products concentration area does not appear.

结果表明：在高电流密度情况下，当燃料沿燃料通道方向流动未出现低燃料浓度区或产物浓度区时，电池电势在燃料流动方向上变化不大；

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