The compressor - outlet pressure is nearly constant around the circumference.是什么意思？

The compressor - outlet pressure is nearly constant around the circumference.

压气机出口压力沿圆周方向接近于常数.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

compressor

n. 压气机，压缩机；

例句
The ROYCO 2000 Series Synthetic Refrigeration Compressor Lubricants are formulated from the highest quality alkylate base stocks.
ROYCO2000系列合成冷冻压缩机油是以高质量的烷基苯为基础油的商品.

outlet

n. 经销店，专营店，排放管，出口，发泄（情感）的途径；

例句
...the largest retail outlet in the city.
该市最大的零售商店

pressure

n. 压（力），压强，大气压，强迫；v. 强迫，迫使，竭力劝说；

例句
This latest incident will add to the pressure on the government...
最近的这次事件将会给政府增加压力。

is

vt.& vi. 是（be的三单形式；n. 存在；

例句
Bollinger 'RD' is a rare, highly prized wine.
博林格RD香槟是一种名贵的备受推崇的葡萄酒。

nearly

adv. 几乎，差不多，险乎；

例句
His increasing alignment with the Reagan administration nearly cost him re-election.
与里根政府日益紧密的关系差点让他失去了连任的机会。

constant

adj. 不断的，持续的，永恒的，始终如一的，坚定，忠实的；n. [数]常数，常量，不变的事物，永恒

例句
She has fought a constant battle with her weight...
她一直在竭力控制体重。

around

adv. 大约，旋转，到处，四处，在周围；prep. 围绕，在附近，前后，左右，在…周围；

例句
He has never put an arm around his wife to accommodate photographers...
他从未为了迎合摄影师而搂住妻子。

circumference

n. 周围，圆周，胸围；

例句
Cut the salmon into long strips and wrap it round the circumference of the bread.
把鲑鱼切成长条，缠裹在面包上。