那可能得花上数年的附加数据收集，或许还得建造新的望远镜，来消除我们的疑问。
It may take years of additional data-gathering, and perhaps the construction of new telescopes, to satisfy our doubts.
因为很难得到充足的望远镜使用时间进行全天调查，如今SETI在阿雷西博的观测采取的是一种附加式的模式。
Because it is so hard to acquire sufficient telescope time for a sky survey, SETI observations at Arecibo were conducted up to now in the in the piggy-back mode.
随时间流逝，即使没有获得专门的望远镜时间，附加式的SETI接收器也能扫描完整个天空。
Over time, even without being granted dedicated telescope time, the piggy back SETI receiver managed to scan the entire sky visible from Arecibo.
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