慢速英语:美国宇航员回顾龙飞船重返地球之旅

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mission – n. an important task, usually involving travel somewhere

splash down – v. land a manned spacecraft in the ocean

capsule – n. the part of a spacecraft people live in

excitement – n. a feeling of being very happy and enthusiastic

descend – v. to move or go down

thruster – n. a small rocket engine on a spacecraft

puff – n. a short, explosive burst of wind

precaution – n. something done to prevent bad things from happening in the future