magneto bell 中文意思是什麼
magneto bell
解釋
磁石電鈴-
Bell spent his evening experimenting with tuning forks ( forkshaped pieces of metal which always produce the same musical note and which are used to tune pianos ), metal springs, and magneto batteries
貝爾整晚用調音叉(叉狀的金屬條,它可以產生相同的音符,並且可以用來調鋼琴、金屬線、磁電池進行試驗。
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