短語詞組短語One thing at a time 每次一件事;一時專一事one step at a time 一步一步地;扎扎實實地;一步一個腳印;一步一步來One Peace at a Time 一步一步拯救世界和平one less at a time 一次減一點one rule at a time 一次學一個語法規(guī)則One factor at a time 而其他參數(shù)都保持不變;法one hair at a time 一次一根頭發(fā)One Road at a Time 一條路One task at a time 一次做一件事 返回 one at a time