Niobyl
铌氧基
🗣️ 情景例句
It's cold outside.
外面很冷。
I'm afraid you will be disappointed.
我怕你会失望。
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。