来自NPR的一篇文章
这句话中描述发射天文望远镜的句子为什么要使用主动,而不是天文望远镜被发射呢?
原段落:The $10 billion infrared telescope launched in December after decades of development and construction, and it thrilled astronomers when it successfully unfolded itself out in space.
所以这里为什么要用主动语态呢?不应该是望远镜被发射吗?