Growth velocity of carbide coating is affected by factors such as the activity of carbon in matrix and treatment temperature.

碳化物覆层成长速度主要受基体中的碳活度、处理温度和时间等因素控制。

youdao

As part of the summit, hundreds of schools across the country are signing up to the Let's Go Zero activity, aiming to become carbon-zero by 2030.

作为峰会的一部分，全国各地的数百所学校签署了“让我们走向零碳”这一活动，旨在2030年之前实现零碳排放。

youdao

The alternative, that the carbon came from the volcanoes, is unlikely because the spike is much shorter than the period of volcanic activity.

另一种说法是这种碳元素来自于火山，但这不可能，因为碳数量激增期比火山活动期要短得多。

youdao

But cement manufacturing produces around five percent of the carbon dioxide released by human activity worldwide.

VOA: special.2009.12.01

The draft curriculum for geography does not contain references to climate change but a section called "Earth science" in the chemistry syllabus says 11- to 14-year-olds should be taught about "the production of carbon dioxide by human activity and the impact on climate" and includes a section on "the efficacy of recycling".

BBC: Keep climate change lessons in curriculum, urge petitions

The resulting photosynthetic activity could, in theory, increase the storage of carbon from the atmosphere into the deep ocean.

UNESCO: MEDIA SERVICES

In 2010, emissions from electricity grid activity in Scotland were estimated to amount to 347 grams of carbon dioxide per Kilowatt hour (kWh) of electricity generated.

BBC: Scottish government updates climate plan