slackened
v.
（使）松弛( slacken的过去式和过去分词 );
（使某物）放慢;
松懈下来;
变迟缓;
例句:
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According to the survey, overall world trade has also slackened.
根据这项调查，世界贸易整体上也有所放慢。
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At about five o'clock, business slackened off.
大约5点钟的时候，生意闲了下来。
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Her grip slackened on Arnold's arm.
她紧握着阿诺德的手松开了。
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When an upset was...inevitable, the horses slackened their pace.
来自B. Hall
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In recent years, Kim acknowledges, business has slackened.
来自VOA
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Then came a bit of thick wood where I slackened speed.
来自J. Buchan