1、Slack up the tent ropes before it rains.
在下雨之前把帳篷的繩子放松。

2、Slack up before you reach the crossroads.
駛近十字路口時要減低速度。

3、Please slack up your speed.I can't run as fast as you!
請你跑慢點(diǎn)!我跑得沒你快。

4、Slack up before you reach the cross - roads.
到交叉路以前減速。

5、Don't slack up your effort, as we are getting to the end.
快到完成的時候了， 別松勁啊。

slack up翻譯