六级Now, though a novel type of steel has been developed that resists fractures at much lower temperatures, while retaining its strength and toughness-without the need for expensive additives.
现在,虽然已经开发出一种新型钢,它可以在更低的温度下抵抗断裂,同时不需要昂贵的添加剂就能保持其强度和韧性。
2019年6月六级真题(第三套)阅读 Section A
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