当芯棒伸出量达到一定值后,随着芯棒伸出量的增大,起皱波纹高度极大值变化不明显。
The maximum height of wrinkling wave does not almost alter with the increase of the initial lead of the mandrel when the initial lead reached a fixed value.
上面的波纹显示,沙丘高度超过100米。
The ripples it shows are sand dunes more than 100 metres high.
实验中沙波纹的高度和波长随风速及粉粒的质量分数的增大而增大,而当粉粒的质量分数超过15%时沙波纹消失。
And the sand ripples on the surface arise obviously with the increasing silt mass fraction and wind speed, but disappear as silt mass fraction exceeds 15%.
由于云形成的高度不同,空气中通常出现在水平方向上的波纹就会呈现在垂直方向上。
Waves in the air that would normally be seen horizontally can then be seen vertically, by the different levels where clouds form.
由于云形成的高度不同,空气中通常出现在水平方向上的波纹就会呈现在垂直方向上。
Waves in the air that would normally be seen horizontally can then be seen vertically, by the different levels where clouds form.
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