And as kind of most economical formed material, cold-formed steel members are used in practical engineering more and more widely.

而且，冷弯型钢作为经济型材，被越来越广泛地应用于工程实际中。

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Obsidian is a kind of black glass formed when the heat of a volcano melts the silica material in sand.

VOA: special.2009.09.16

But they are really made out of carefully formed clay material.

VOA: special.2009.09.09

This specialized material, formed into the Quintet's speaker cabinets with non-parallel walls to diminish internal standing waves, is truly the next generation in compact home speaker technology.

ENGADGET: Klipsch refreshes Quintet home theater system HD

Then as the planets formed, they cleared out the material in their vicinity.

FORBES: Main Asteroid Belt No Remnant Of Exploded Planet

It could be defects due to missing atoms, thermal vibrations of the crystal lattice, or even the boundaries between small, imperfectly formed crystals that make up the material.

ECONOMIST: MONITOR