Featured by good sintering level and dense structure, it is an excellent material for making middle-grade magnesia refractory products.

产品烧结程度好，结晶致密，是生产中档镁质耐火制品的优质原料。

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Have engineering technology background, middle-grade professional certificate or national registered cost estimator bearer is preferred.

有工程技术背景及助理级以上职称者或持有全国注册造价员证者优先考虑。

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According to the latest figures, the average salary of a middle-grade manager is nearly twice as high in France and Germany as in the United Kingdom.

据最新统计，中级经理人员的平均薪俸，法国和德国要比英国高出近一倍。

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This means they can raise capital from private lenders: 31% of the bank's middle-income lending now goes to countries with investment-grade credit ratings.

ECONOMIST: The World Bank

There is also increasing evidence that interventions can produce middle-to longer-run effects on school achievement, special education placement, grade retention, disruptive behavior and delinquency and high school graduation.

UNESCO: II Part Analytic Section

My kids have entered that nebulous no-mans-zone known as the middle grade (or tween) years: too old for simple chapter books (like The Magic Tree House series), but too young to demolish YA books about vampires by the dozen.

FORBES: Not Ready for Vampires? Laurel Snyder Writes Great Books for Tweens