The gale is slackening up.

暴风在减弱。

The signs of China's slackening demand are manifold.

中国需求走软的迹象是多方面的。

There has been a slackening of the arms race recently.

军备竞赛近来已有所缓和。

On and on we run, our pace never slackening for a moment.

持续不停的跑着，我们的步伐从来没有放缓的一刻。

There will, however, be no slackening of our efforts in the direction.

然而，我们不会懈怠努力的目标。