Colour additives belong to one of two groups: pigments derived from natural sources such as vegetables, minerals or animals and those not found in nature and must be man-made.

色素添加剂划分成两大类：从自然资源中(如植物，矿物，动物)获得的天然色素和不能在自然界中找到的人造色素。

youdao

Traditionally mariculture, involving the use of a system of man-made ponds in rearing specific Marine or brackish-water animals, has been practised in Indonesia for hundreds of years.

传统的海水养殖在印度尼西亚有几百年的历史。它包括在人工池塘中养殖专门的海水或半咸水动物。

youdao

The greenhouse gas figure equates to 18% of man-made greenhouse gas emissions, largely thanks to the methane and nitrous oxide animals' "enteric fermentation".

畜牧业产生的温室效应气体，大部分由甲烷沼气和动物肠内发酵及粪尿处理产生的氮氧化物，总量占到人为产生温室气体的18%。

youdao

The village has a man-made pond to provide water for the animals and a veterinary clinic.

BBC: Rajasthan gets India's first 'elephant village'

In Bangladesh, villagers build raised earth mounds the size of football pitches, on which trees are planted and food and water is stored: in an emergency, they and their animals can retreat to this man-made higher ground.

ECONOMIST: After the deluge

Very often, these man-made devices unwittingly or deliberately exploit the same tricks evolved by animals.

ECONOMIST: The science of survival