本周，科学家宣布鼻喷剂有助于提高记忆力。
And this week, scientists have declared that a nasal spray can help your memory.
今年，科学家宣布他们发现这些星体上传出的微光。
This year, scientists announced that they had seen shimmers of light from the planets themselves.
西班牙科学家宣布，他们已经成功克隆出世界上首头斗牛，并为它取名为"高特"。
Scientists in Spain say they have cloned a fighting bull for the first time.
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