Topline
n. 背线(指动物身体上部从头至尾的外形线)
🗣️ 情景例句
I don't see why she's so against the idea.
我不明白她为何如此反对这个计划。
John always takes pleasure in leaving the city for a while.
约翰常常以溜出城镇一会儿为乐。
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。