Mappings
(mapping 的复数) [计] 映射; 变换; 映象\\n[化] 测绘; 绘图
🗣️ 情景例句
since this is so easy ....
既然那么简单……
Excuse me for being late.
对不起我迟到了。
it must be known to any kind of radio astronomer in the universe.
这个频率是宇宙中任何射电天文学家都应该熟悉的。