Trigonometric radio.
圖片參考:http://imgcld.yimg.com/8/n/HA00101881/o/701205200021313873407630.jpg
收錄日期: 2021-04-13 18:42:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20120520000051KK00213