点击下方单词,选择对的这个单词
点击下面链接下载与本句相关的学习资源，包括PDF教材和音频练习，方便课后复习：
1. 航天飞机;太空梭A space shuttle or a shuttle is a spacecraft that is designed to travel into space and back to earth several times.
1. a reusable spacecraft with wings for a controlled descent through the Earth's atmosphere
多通过句子记忆单词，而不是单独死记硬背。
