Nitric oxides are one of the main air pollutants.

氮氧化物是主要的大气污染物之一。

youdao

Of the two main air compressor types for reciprocating (piston) and rotary (screw).

两种主要的空压机类型为往复式(活塞式)和旋转式(螺杆式)。

youdao

From the analysis of main air pollution sources, important applications of plants in controlling indoor air pollution are given in this paper.

从分析室内空气污染的主要来源入手，论述绿色植物在控制居室空气污染方面的重要作用。

youdao

Mister Zundt says diesel vehicles are the main cause of air pollution in Sao Paulo.

VOA: special.2009.09.07

At Rhein-Main Air Base in Frankfurt, flights increased dramatically from mid-afternoon Sunday to mid-day Monday.

CNN: Finally, troops leave Germany for Bosnia

About 4, 500 people work across the 1, 200-acre site (485 hectares), which is one of the Royal Navy's two main air bases.

BBC: No more job cuts at RNAS Yeovilton says Commodore Alexander

RHEIN-MAIN AIR BASE, Germany (CNN) -- Troops of the U.S. 3rd Corps Support Command already knew the drill by the time they headed for Hungary from Wiesbaden, Germany.

CNN: Finally, troops leave Germany for Bosnia