Indicatio
指征, 适应证
🗣️ 情景例句
Where are you going during Summer vacation?
暑假你打算去哪儿？
Ignorance is bliss.
眼不见为净。
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。