The atmospheric boundary layer(ABL) and its turbulent structure in locally thermal circulations and fields of winds and temperatures in the corresponding free atmosphere( FA) are discussed,The main conclusions are as following:(1) With local heat source strengthening, the ABL rapidly develops upwards, especially over the center of the heat source, and at the middle of the ABL,t.
本文利用二维高阶矩湍流闭合的中尺度数值模式,模拟了局地加热源上大气边界层的湍流结构,讨论了大气边界层与自由大气之间的相互作用,并由此亦使人们在海风消失时常常观测到的“风涌(bore)”现象得到解释。
She had drawn an hour's free breath!
——她曾经吸进了一小时的自由空气！
FREE-AIR IONIZATION CHAMBER USED IN ABSOLUTE MEASUREMENT OF LOW ENERGY X-RAYS
用于低能X射线绝对测量的自由空气电离室
steam air forging hammer
蒸气－空气自由锻锤
as free as the air
像空气一样自由自在
free piston air compressor
自由活塞空气压缩机
ALFA (Air Lubricated Free Attitude)
空气润滑的自由位置
humidity ratio of moist air in the free stream
自由气流湿空气的湿含量
flow freely, as of air or liquids.
像空气或液体一样自由流动。
air is forced through free reeds by bellows.
通过风箱空气被强迫经过自由簧片。
To move about or flow freely, as air.
流动，流通自由走动或流动，象空气一样
A gas released in free space would expand indefinitely.
在自由空间放出的气体将无限膨胀。
A few percent of the CO2 molecules in the air manage to find such electrons.
空气中的一部分co2分子会吸引那些自由电子。
Several pages were torn away by the strong wind, the air of the liberty.
急风已将撕碎了的信吹散，这是自由的空气。
"You are to-day free as air--come and dine with me;
“您今天如空气一般自由，请和我一起用晚餐吧。
The purpose of the free board is to allow the solids to separate from the gas stream.
自由空域的目的是要使固体从气流中分离出来。
Study on Free-space Optical Communication Atmosphere Channel and Design of System;
自由空间光通信大气信道模型研究及系统设计
Of, relating to, or having the constitution of air.
空气的空气的，有关空气的或由空气组成的
Air consists chiefly of nitrogen.
空气主要由氮气组成.