縮短，削減（做某事的時間）
clip sth off sth
to reduce the time that it takes to do sth by a particular length of time
She clipped two seconds off her previous best time.她把自己之前的最佳紀錄縮短了兩秒。
釋義來自《牛津高階英漢雙解詞典》第 9 版
