国产麻豆入在线观看,中文字字幕在线一本通,中文字幕在线观看日韩,99视频这里有精品,狠狠狠狠狠狠狠狠狠狠,一级毛片一级**,黄色一级性生活

低谷英文(底鼓英文)

低谷的英文： trough 參考例句： The highest flood have the lowest ebb. 高潮之后必有低谷。 The business cycle is a series of peak and trough. 商業(yè)周期是一系列的高峰期和低谷期。 The business cycle is a series of peaks and troughs. 商業(yè)周期是一系列的高峰期和低谷期 This failure was the nadir of her career. 這次失敗是她事業(yè)上的低谷。 The business cycle is a series of pe...