Cissoid
凹边的,蔓叶线的
🗣️ 情景例句
Michelle, would you like to try the crab salad, too? Michelle
要不要也试试蟹肉沙拉？
How would 12:45 be?
12:45怎么样？
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。