sign in片語動詞KK [saɪn ɪn] /saɪn ɪn/發音片語動詞1登入、登錄You need to sign in before you can watch the video.你要先登入才能觀看這部影片。2簽到、登記All visitors must sign in at the front desk.所有訪客都必須在前台簽到。3為……辦理登記、代為簽到可拆開The receptionist signed us in and handed over the badges.接待員替我們辦好登記,並發給我們識別證。名詞1登入、簽到The sign-in page keeps loading but never opens.登入頁面一直在載入,卻始終打不開。