Ministry of Education 《Revised Mandarin Chinese Dictionary》

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Word	電源開關
Bopomofo	`ㄉㄧㄢ^ˋ` `ㄩㄢ^ˊ` `ㄎㄞ` `ㄍㄨㄢ`
Hanyu pinyin	diàn yuán kāi guān
Interpretation	開啟或關閉電源的按鍵或按鈕。