Desolation transformation is an important solid phase transformation of metals, and is the theoretical basis of aging treatment.

脱溶转变是金属材料的一种重要固态转变，是时效处理的理论基础。

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The central point of this course is to provide a physical basis that links the structure of metals with their properties.

本课程重点在为金属结构与性质间的关联提供物理学的基础。

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Their corrosion-resistant properties make them preferable to steel and other metals on an economic basis, for such uses as oil-well drilling equipment, chemical piping, tanks, and similar equipment.

其抗腐性使其在经济上优于钢和其他金属，这类用途有油井钻探设备、化学品管道、贮罐及类似设备。

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In general, the increase in the supply of precious metals is a single-digit number on a yearly basis.

FORBES: Where Is The Limit For Gold?

Trading in the precious metals remains choppy on a day-to-day basis.

FORBES: Comex Gold Sharply Lower As It's A "Risk Off" Day In The Market Place

Also, the precious metals market prices are impacted on a day-to-day basis by currency movements.

FORBES: Comex Gold Firmer on Follow-Through Strength from Friday's Strong Gains