Safety hazards source presents at not only raw materials, processing, storage, distribution and other sectors, and more importantly, one of the sources is environmental pollution.

安全危害源不仅存在于食品的原料、加工、贮藏、流通等环节，更重要的来源之一是环境污染。

youdao

Raw materials, processing and consumption are all part of a process through which transport is powered.

ECONOMIST: On Canada's border

It has also managed to retain some of the profits from processing its raw materials - something most African countries have failed to do.

BBC: Africa

SOEs in sectors like equipment manufacturing, raw-materials production and food processing.

ECONOMIST: The other China