VOA慢速英语:外层空间物体是行星的饼干状部分

original – adj. existing since the beginning

asteroid – n. a space rock, either small or the size of a large moon, that orbits the sun

comet – n. an outer space object made of material like gas and ice which is left behind in its orbit as it approaches the sun

inevitable – adj. something that cannot be avoided or prevented

jump to conclusions – v. to guess the facts about a situation without having a lot of information

pancake – n. a thin, flat bread-like food that is cooked in a pan