Metaldehyde
n. [化]聚乙醛, 四聚乙醛
🗣️ 情景例句
Hi, how are you doing?
你还好吗？
I live on Washington Street.
我住在华盛顿街。
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。