Ethylating
乙基化(的)
🗣️ 情景例句
Richard, I know your next book will be a success. Richard
我相信你的下一本书会成功。
I really should be on my way.
我真的该告辞了。
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。