Doppio
（音乐术语）成倍，双重
🗣️ 情景例句
I do mean it.
我的确是说真的。
I'm very pressed for cash at the moment, can I pay you next week?
我现在手头有点紧，再周再付给你行吗？
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。