slack up
松懈, 放松, 将（绳子等）放松
例句与用法：
Slack up before you reach the crossroads.
驶近十字路口时要减低速度。
词形变化：
副词: slackly |
形容词比较级: slacker |
形容词最高级: slackest |
名词: slackness |
动词过去式: slacked |
动词过去分词: slacked |
动词现在分词: slacking |
动词第三人称单数: slacks |
1. 松劲; 懈怠
Don't slack up in your studies.
不要荒费你的学业。
2. 减缓; 变呆滞
The train slacked up as it came into the station.
火车进站时将速度减慢了。
slack upslack up1.■(使)减速; (使)松劲The train slacked up as it came into the station.列车进站时减了速。The doctor advised Facer to slack up for few days, as his lifestyle was having a bad effect on his heart.医生劝告费塞放松几天, 因为他的生活方式对他的心脏产生了不良影响。Slack up the tent ropes before it rains.在下雨之前把帐篷的绳子放松。Please slack up your speed.I can't run as fast as you!请你跑慢点!我跑得没你快。
slack up1.■减缓，放慢；变呆滞：Business slacked up.生意清淡了。2.■松劲；懈怠：3.■加油!
见:slack: slack up