The parts we seek to replace are often made to very high tolerances, of very specific materials, designed to withstand very particular forces and environments.
To reduce its energy consumption, the Building and Construction Authority requires that all new structures be insulated with materials designed to retain cool temperatures.
The Repair Café Foundation and its ilk all subscribe to the idea of a "circular economy", an economic utopia in which flows of materials are reduced to just two types: biological materials designed to re-enter the biosphere, and technical materials designed to circulate with minimal loss of quality.
A great starting place for anyone unfamiliar with the new computing curriculum is the Computing at School CAS QuickStart Computingng website, which features continued professional development (CPD) materials designed to help primary and secondary teachers deliver the new curriculum.
The Apollo suits are made of complex layers of materials designed to keep astronauts comfortable and mobile while protecting them from punctures and tears, including micrometeorite impacts, that could kill them.
For example, retailers or consumers will benefit from buying food that is packaged with materials designed to keep it fresh longer, but they may not want to pay more to help defray the cost to manufacturers for improving the packaging.
And in Great Britain, a relatively benign landmass that enjoys a pleasant climate, humans currently jaunt about their business sporting fleece, polyester and scientific materials designed to withstand the extreme rigours of Himalayan peaks and Arctic tundras.
After Anderton Park featured in an Education Guardian article last year about the use of teaching materials designed to prevent homophobia, she says a teacher received a piece of hatemail saying: "I've read about your disgusting sodomite teaching ways.
The Heartland Institute is considering paying a sometime consultant for the Department of Energy up to $100,000 a year to produce teaching materials designed to spread climate-change scepticism.
Montessori used materials designed to appeal to the senses, created learning games and activities, and developed strategies for teachers to guide children in learning rather than lecture them from a book.
The robots, lights, cameras and other equipment deployed to deal with the crisis are made of titanium, thick glass and other superstrong materials designed to withstand the crushing force.
