We suggest that the sequence proposed reflecto the material expansion of the violent activity of the galactic nucleus.

提出，这样一个序列是星系核活动，物质向外抛射的结果。

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Temperature contraction coefficient is a parameter for material expansion and contract property when temperature becomes high ot low.

温度收缩系数是反映材料热胀冷缩特性的参数，贫砼基层材料的温缩特性又直接影响到温度应力。

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Expansion perlite is a kind of traditional architectural heat preservation material, which is widely applied.

膨胀珍珠岩是一种传统的建筑保温材料，应用非常广泛。

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This material has been the basis of the expansion of global media, an expansion that is now accelerating with the arrival of digital television.

ECONOMIST: A world view | The

The reason: Hastings had decided to forge ahead with costly expansion outside the U.S. and escalate spending to license more compelling material for Netflix's Internet video library, shriveling the company's profits.

NPR: Netflix Enjoys Marquee Day As Stock Soars 42 Pct

Perhaps even more important, the expansion of the energy sector is galvanizing manufacturing, hitherto the weakest link in the material boy economy.

FORBES: The Real Winners Of The Global Economy: The Material Boys