局部变化，亦即某地的气压趋势(pressure tendency)， ai v 乃气压 趋势之梯度所引起之非地转风，称等 变压风 ( isallobaric wind )。
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当一个洞形成的时候，平衡内外气压的强烈趋势会生成一个通风的隧道，就像水流过管子一样。
When a hole forms, a strong tendency to equalize creates a rushing tunnel of wind, like water flowing through a hose.
随着吃水的加大或分舱内气压的减小，垂荡固有周期值有增大的趋势。
With an increase in the draft or a decrease in the cabin pressure, the natural heave period shows an increasing trend.
平均本站气压新旧站日变化趋势较一致。相对湿度新站较旧站略偏高；
The change trends of the average pressure in each station are more consistent. Relative humidity of the new station is slightly higher than that of the old station.
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