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n. 作战；群众或部队的集合
🗣️ 情景例句
Did you see what she was wearing?
你看到她穿的是什么？
He is explaining the details of his idea.
他在详细说明这个构想。
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。