unruly

US /ʌnˈruli/

UK /ʌnˈru:li/

C1 高級
adj.形容詞不羈的;難以控制的
The unruly teenager finally learned to respect his parents

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能量守恆的簡單證明 (A Simple Proof of Conservation of Energy)

03:58能量守恆的簡單證明 (A Simple Proof of Conservation of Energy)