Polypetipe
缩多氨酸
🗣️ 情景例句
Married women should be addressed as 'Mrs.'.
已婚的女性应被称作 'Mrs。' 。
That sounds like the product we had in mind.
那种产品好像就是我们所想要的。
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。