Feedback circuit
[计] 反馈电路
🧩 词语组成解析
🗣️ 情景例句
Good-bye.
再见。
We noticed the noise.
我们注意到了那种声音。
But here we come up against the most difficult of all obstacles to contact with people on other planets ----the astronomical distances which separate us.
然而，在和外星人联系中我们遇到的最大困难是分隔我们的天文距离。