VOA慢速英语:蓝色起源向美国宇航局交付月球着陆器模型 以供测试

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

feedback – n. helpful information or criticism that is given to someone to say what can be done to improve a performance or product

component – n. one of the parts of something, especially a machine

full-scale – adj. very large or serious and involving everything that is possible or expected