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单词 Scale height
释义

Scale height

原声例句
CCTV 见闻

Bilateral cooperation in nuclear power, finance, aviation, science, technology and agriculture scaled new heights both in level and scale.

中捷核电、金融、航空、科技、农业等领域合作日新月异,合作水平和规模不断提升。

202325

Despite battling a debilitating disease, his indomitable spirit saw him scale the heights of scientific achievement, transforming our understanding of the universe.

尽管与令人衰弱的疾病作斗争,但他不屈不挠的精神使他登上了科学成就的顶峰,改变了我们对宇宙的理解。

中级英语短文

Gong Lijiao and Liu Shiying also scaled new heights after bagging the gold in the women's shot put and javelin throw respectively.

巩立姣和刘诗颖分别在女子铅球和标枪项目中获得金牌后,刷新了自己的最好成绩。

朗文OCLM-01单词

By the age of 21, he had already scaled the heights in the academic world.

【scale】他在 21 岁的时候就已经登上了学术界的高峰。

人物档案

By the 9th of November, the First Army had scaled the heights and was racing down them in pursuit of the retreating Germans.

到 11 月 9 日,第一集团军已登上高地,并迅速冲下高地,追击撤退的德军。

中文百科

大气标高

标高(scale height),又译特性高尺度高标尺高比高,是一个长度,可用来比较同一个物理量在不同环境的减少率。如果一个物理量每经过一段距离H,其值就减少为原来的值的1/e,长度H就称为标高。标高越大,改变的幅度越小。

标高常用于大气科学。大气标高为:

H = - P \frac{dz}{dP}
\frac{dP}{dz} = - g \rho

假设大气是理想气体,套用状态方程序:

 \rho = \frac{MP}{kT}

,其中M是平均分子量除以阿伏伽德罗常数。

从以上两式可得

\frac{dP}{P} = \frac{-dz}{\frac{kT}{Mg}}

假设在大气的某一部分在热力学平衡之中,即设温度为常数:

H = \frac{kT}{Mg}
P = P_0e^{(-\frac{z}{H})}

一些星体数据:

  • 火星:11.1 km
  • 地球:7~9 km
  • 太阳的光球层:270km
英语百科

Scale height 大气标高

In various scientific contexts, a scale height is a distance over which a quantity decreases by a factor of e (approximately 2.71828, the base of natural logarithms). It is usually denoted by the capital letter H.

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更新时间:2025/6/19 19:14:15