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The Viking spacecraft consisted of two orbiters.
维京太空船由两个轨道航行器组成.
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The moon is also home to lunar orbiters that mapped the moon before they crashed into its surface, adding to the garbage heap.
2018年12月四级真题（第二套）听力 Section C
英汉双解词典包含4367426条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。