Some do not even realise that cyclical downturns are normal.有些人甚至不明白周期性衰退是正常的.Oscillators work great in trading ranges, where they catch upturns and downturns.在横盘时振荡指标表现好,它们能抓住上涨和下跌.It's our safety margin in economi...

downturns的音标：...

n.（价格或活动）开始下降( downturn的名词复数 )...