полимер

полимер

A polymer is a giant molecule made up of thousands of atoms. It can be natural or man-made (synthetic). Many plastics in everyday use are polymers, such as polythene or PVC; but then so is cellulose, which makes up wood pulp from which paper is manufactured.

0 0

향상

이미지 추가

품사: 명사
동의어:
용어블로그:
분야/도메인: 자연 환경
카테고리: 기후 변화
Company: BBC
제품:
두문어-약어:

자세히

내 용어집에 추가

기타 언어:

자세히

하고 싶은 말

유사 용어 보기

рафинирање на нафта

자연 환경; 기후 변화

Oil refining is the process of taking crude oil and turning it into fuels such as petrol and diesel. Crude oil varies in its composition, consisting of hydrocarbons and other ...

органско земјоделство

자연 환경; 기후 변화

There is no universally accepted definition of organic farming, and each country regulates what can and cannot be labelled "organic". In general, it describes a form of ...

озон

자연 환경; 기후 변화

Ozone is made up of three oxygen atoms. It has benefits and dangers depending on where in our atmosphere it occurs: near ground level, it is a pollutant that affects respiration; ...

емисии по глава на жител

자연 환경; 기후 변화

The total amount of greenhouse gas emitted by a country per unit of population.

пестицид

자연 환경; 기후 변화

A pesticide is a substance used to kill a pest, and in a farming context a pest is anything that attacks or competes with crops. Hence, there are many different types of ...

фотоволтаична клетка

자연 환경; 기후 변화

Photovoltaics are materials that produce electricity from sunlight. A single photovoltaic cell can be used to power small devices such as calculators; combined in solar panels ...