Sentence examples for materials are harder from inspiring English sources

Some materials are harder to ignite than are others, and when ignited, they are resistant to sustained burning.

Assuming the recall accuracy is related to knowledge acquisition, systematic differences in recall accuracy between flashcards can indicate which materials are harder to learn and which materials are easy.

Such materials are hard and inflexible; epoxy resins are an example.

Few people will cook much of what Thompson describes: the materials are hard to come by, the techniques are often not domestic, but the value of his record of a subculture (which, counterintuitively, is of very recent origin) is great.

Nkuzo would love to spend much of the day at her sewing machine but the churned-mud roads linking the settlement with towns make transport difficult and expensive, so materials are hard to come by.

Hard and brittle materials are hard to machine since SSD is easily induced in a machining process.

Unfortunately, the three properties tend to work against each other, which is why new thermoelectric materials are hard to find.

Even though these materials are hard, they are extremely susceptible to damage, especially due to the glass phase content.

On the other hand, even though the use of adhesives is still a promising joining method for thermoplastic composites [6], it is thought that those materials are hard to bond because of their low surface energies.

All these materials are hard, brittle, dark-gray solids with the hardness increasing with the boron content.

The carbonized materials were hard to graphitize by heat treatment of higher temperature.