But soon, the reins slackened in his hands.

他慢慢松开了手中的缰绳。

The tempo never slackens in this erudite book.

在这本精深广博的书中，节奏从未松懈。

As economic growth slows, demand for oil would slacken.

随着经济增长放缓，对石油的需求也会放缓。

But, when the brief summer comes, temperatures rise and winds slacken.

但当短暂的夏日来临时这里将变得风和日丽。

If you move the stick fast enough, you don't have to slacken your pace.

只要棒挥得够快，就不用放慢步子。

Fudges plump face seemed to slacken, as though somebody had let the air out of it.

福吉肥胖的面孔似乎突然松懈了下来，好像有人放跑了里面的空气。

He thought awhile, and then asked his crew if it was not time to slacken speed.

约翰·班斯比感到非常忧虑，他考虑现在是否应该找个港口停一会，这时他便去和他的船员们商量。

What if the financial lifeline allowed countries to slacken the pace of reforms, or made life easier for Iran?

如果金融生命线能让各国放慢改革的步伐，或者让伊朗的日子好过些呢？

The upward rush of the machine slackened off; a moment later they were hanging motionless in the air.

飞机上升的冲刺减缓下来，不一会儿他们便一动不动是在了空中。

So that means that temperature difference is slackening or weakening.

所以这意味着温差正在减弱或减弱。