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1·Redouble your efforts and not slacken off.

要再接再励， 不能松劲。《新英汉大辞典》

2·Inflationary pressures continued to slacken last month.

通货膨胀的压力上个月持续减轻。《柯林斯英汉双解大词典》

3·We've been really busy, but things are starting to slacken off now.

近来我们的确很忙，不过现在情况开始有所缓解了。《牛津词典》

4·He waited, expecting it to slacken pace, or to swerve from him into a different course.

他等待着，希望它放慢脚步，或者绕过他改变方向到另一条路上去。

5·Don't slacken your vigilance.

不要麻痹大意。《新英汉大辞典》

6·Nothing could make us slacken off.

什么也不能让我们松劲。

7·Rope can't slacken, cannot stop.

⊙、搓绳不能松劲，前进不能停顿。

8·Don't slacken your grip.

不要放松紧握着的手。

9·Trade have slacken off.

不要放松紧握着的手。

10·Slacken the tent ropes before it rains.

下雨之前将帐篷的绳索放松。