Has Just Been Developed 刚刚开发出来
Has Been Further Developed 标准得到进一步拓展
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.
然而现在,一种新型的钢已经被开发出来,它可以在更低的温度下抵抗断裂,同时保持其强度和韧性,而不需要昂贵的添加剂。
The longest piece that I have been working on has been developed over the last three years.
我一直在写的一个最长的剧本已经写了三年了。
The basic thing, though, is that every country has to take the insights that have been developed around the world.
但是最基本的是,每个国家都要不断学习,世界各地的先进理论。
One that was developed a number of years ago but has been perfected and refined in recent years with very, very good research.
该概念很多年前就已经提出了,但在近年通过高水平的研究才被改进完善
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