clock k in打卡;上班打卡
clock-in entry上班打卡输入
clock-in system上班打卡制度
clock-in card[劳经] 上下班记时卡
Atomic Clock Ensemble in Space太空钟
Pervasiveround-the-clock plug in全天候
clock in CLKIN时钟输入
clock in and out上下班打卡;记录上下班时间
ckin clock in钟表输入
PHRASAL VERB（动词词组） When you clock in at work, you arrive there or put a special card into a device to show what time you arrived. 打卡上班
I have to clock in by eight.
我必须八点前打卡上班。