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(单词翻译:双击或拖选)
I knew a guy who played his radio only in the morning.
When someone asked him why,he replied, "This is an AM radio."
1. I knew a guy who played his radio only in the morning.
我认识一个人,他只在早上收听广播。
2. When someone asked him why,he replied, "This is an AM radio."
当有人问他为什么时,他回答:“(我的)这一台是AM(调幅)收音机。
"AM"表示“调幅”(amplitude modulation),也可表示“上午的”,通常与时间连用,不需再加o'clok,也可以用"a.m."表示,如:at 9 a.m.(在早上九点)。广播的收听方式有调幅 (AM)和调频(FM/frequency modulation)两种。
那个拥有AM收音机的人认为AM是早上的意思,所以只能在早上收听。
amplitude [ˈæmplɪtju:d] n.(物理)振幅
modulaiion [ˌmɒdjʊ'leɪʃn] n.(电子)电波频率的调变;调幅
frequency [ˈfri:kwənsi] n.(物理)频率
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1 notes | |
vt.记下;对…加注释n.注意( note的名词复数 );笔记;单音;特征 | |
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