When the dome was rotated, the birds changed their direction to match the artificial sky.

当圆屋顶旋转时，鸟儿们改变了方向，以适应人造天空。

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Rocket propellant has barely changed in the more than 50 years since the launch of the first artificial satellite Sputnik.

自第一颗人造卫星史泼尼克发射以来，火箭推进剂在超过50年的时间内变化不多。

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Tom Mitchell, a professor of artificial intelligence and machine learning at Carnegie Mellon University, said the February meeting had changed his thinking.

卡耐基·梅隆大学的机器学习和人工智能教授汤姆·米切尔表示，这次会议改变了他的观点。

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You can imagine that there are many requirements that a device like this has to meet in order for it to be a good artificial hip and we'll talk about those and how the design of these has changed over the years and what we can expect in the future.

你可以想象,这种装置对技术要求极高,这样它才能成为,一个好的人工髋关节,我们会讲到这些,以及这些年来这项技术的设计有哪些改进,在未来会有怎样的创新

耶鲁公开课 - 生物医学工程探索课程节选

That changed just over a year ago, when Edwards Lifesciences Corp. won approval to sell an artificial aortic valve flexible and small enough to fit into a catheter and wedged inside the bad one.

NPR: Heart Repair Breakthroughs Replace Surgeon's Knife