A secondary air pollutant is a harmful chemical formed in the atmosphere through a chemical reaction among air components.

一二次空气污染物是一种有害化学形成了在大气中经过化学反应之间的空气成分。

youdao

The ceremony was built around a theme of community participation, and symbolised the land, sea, and air components - highways, tunnels, reclamations, Bridges and the airport - of the ACP.

该项典礼以社会各界同参与为主题，并以海、陆、空表演象征机场核心计划中公路、隧道、填海工程、桥梁及机场等项目。

youdao

By studying these components, scientists have obtained a detailed archive of many aspects of climate, including air temperatures, snowfall, and concentrations of greenhouses gases in the atmosphere.

通过研究这些成分，科学家们获得了气候的许多方面的详细档案，包括空气温度、降雪和大气中温室气体的浓度。

youdao

As some of the above-linked articles eventually get around to noting, this report shows a mathematical association between traffic air pollution components in a certain range, as the authors calculated them, and an increased autism risk.

FORBES: 5 Caveats About The Autism And Air Pollution Study

In the heyday of conglomerates, AVM had 15 divisions, making everything from auto parts and furniture to air-conditioning components.

FORBES: Indestructible

Toyota zeroed in on 174 key components, such as air bags, fuel pumps and brake systems.

FORBES: Cover Story