Is a basic raw material grade aluminum hydroxide.

是一种最基本的原料级氢氧化铝。

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Correlation coefficients between the thermal conductivity and bulk density, open porosity, permeability and raw material grade was obtained respectively.

另外，还计算了导热系数与体积密度、显气孔率、透气度和原料等级之间的相关系数。

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The results showed that contents of polyphenols, catechins, caffeine and amino acids decreased, off_flavor aroma got weak and tea cream decreased with the drop of raw material grade.

结果表明，随原料级别的降低，所制罐装绿茶水中多酚类、儿茶素、咖啡碱、氨基酸的含量下降；

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"Last November,Iran announced that it would build In February, Iran said that it would begin to enrich uranium to nearly 20 percent-moving,closer to weapons-grade material."

VOA: standard.2010.06.09

The U.S.government says Tehran is trying to make weapons-grade nuclear material.

VOA: standard.2010.06.29

When enriched to a high degree, uranium can be used for weapons-grade material.

CNN: Defiant North Korea 'to weaponize plutonium'

Then, changes in the mine plan delayed access to higher-grade material, as well as a slower ramp-up of the DOZ mine, Adkerson expained.

FORBES: Freeport Copper, Gold Output Falls In 3Q But Expected To Rise Again As Indonesian Production Picks Up

Since 2010, Iran has been enriching uranium to a level of 20%, an important technological step towards being able to produce more highly enriched weapons-grade material.

BBC: Iran nuclear crisis: Jalili says talks 'positive step'