形容词
中文翻译：高级的
同义词：
['superior', 'top-notch', 'first-rate例句：1. The high-grade steel is used for building bridges and buildings.（这种高等级的钢材用于建造桥梁和建筑物。）2. This product is of high-grade quality', 'which makes it very popular.（这款产品质量上乘，非常受欢迎。）']
例句：
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1. The high-grade steel is used for building bridges and buildings.
这种高等级的钢材用于建造桥梁和建筑物。
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2. This product is of high-grade quality, which makes it very popular.
这款产品质量上乘，非常受欢迎。
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3.The high-grade diamonds are rare and valuable.
这些高等级的钻石稀有且价值昂贵。