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欢迎收看美国之音：新闻词汇。

Scientists have discovered that songbirds, like humans, learn to make sounds by copying what they hear. Hypothesis.

科学家发现，鸣禽和人类一样，通过模仿听到的声音来学习发声。假设。

Songbirds and humans have a similar brain structure for learning sound, say researchers at Rockefeller University.

洛克菲勒大学的研究人员称，鸣鸟和人类在学习声音方面有着相似的大脑结构。

Scientist Erich Jarvis formed a hypothesis that

科学家埃里希·贾维斯提出了一种假设，

molecules guide brain connections that create paths to the voice box, permitting the copying of sounds.

即分子引导大脑连接，从而创造出通向喉的路径，从而允许声音的复制。

A hypothesis is an idea or theory that is not proven. Forming a hypothesis is the first step in the scientific method.

“假设”是一种没有被证明的思想或理论。构成假设是科学方法的第一步。