v.使松弛；使緩慢；變?nèi)?/p>

We're on the last lap, so don't slacken! 我們已處最後階段，可不要松勁啊！

The bonds of traditional family life began to slacken. 傳統(tǒng)的家庭生活的紐帶開始松弛。

There is no reason to believe that this pace will slacken. 沒有理由使人們相信這個(gè)速度會(huì)變慢。

The train slackened speed as we approached the station. 當(dāng)我們快到車站時(shí)，火車減慢了速度。

The demand for coal begins to slacken off in the spring. 煤的需求在春天開始減少。