slack off/up
1. 松劲; 懈怠
Don't slack off in your studies.
不要荒费你的学业。
2. 减缓; 变呆滞
The train slacked off as it came into the station.
火车进站时将速度减慢了。
take up the slack
1. 收紧松弛的绳索
The sailors pulled at the rope to take up the slack.
水手们拉起绳索把它收紧。
习惯用语feel slack1.感到无精打采have a good slack1.舒舒服服地休息一下pull up one's slacks1.[口]振作起来take up the slack1.拉紧松弛部分2.(企业)使闲散的人力物力充分利用起来; 抓紧松弛环节slack off [away]1.松劲, 放松, 怠工, 敷衍了事slack up1.放慢特殊用法business slack1.经济停滞coal slack1.煤屑economic(al) slack1.经济衰退event slack1.节点迟缓joint slack1.联轴器; 连接接合子[套筒]laying slack1.敷设余量tape slack1.磁带松弛train slack1.列车中车钩间游间slack of finance1.银根松弛slack of rodding1.导管路松弛