不同的人造物质被发明出来，用于制革上。
Various synthetic substances have been invented to be used in place of leather.
二恶英是目前科学上已知的最毒的人造物质。
Dioxin is the most toxic man made substance known to science.
马丁先生是英国人造物质环境历史方面的专家。
Mr Martin is an expert in the history of Britain's built environment.
肥料：含有促进植物生长和增产的化学元素的天然或人造物质。
Fertilizer: Natural or artificial substance containing the chemical elements that improve growth and productiveness of plants.
由于始铝钙和已知人造物质的关系，人们就知道了始铝钙是在什么条件下生成的。
Because of krotite's relationship to known human-made substances, the conditions under which it forms are already known.
由于始铝钙和已知人造物质的关系，人们就知道了始铝钙是在什么条件下生成的。
Because of krotite's relationship to known human-made substances, the conditions under which it forms are already known.
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