Periodogram
[计] 周期图
🗣️ 情景例句
Ellen and I'll take you to your room. Ellen
和我带你去你房间。
The packing must be strong enough to withstand rough handing.
包装必须很坚固，能承受野蛮装卸。
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。