单词 来回摇 例句 DEFINITIVE EXAMPLES 权威例句〔back and forth〕She swayed gently back and forth to the music.她随着音乐的节奏轻轻来回摇摆着。剑桥高阶〔back and forth〕The chair rocked back and forth.这椅子来回摇晃。韦氏高阶〔balance〕She had trouble keep...