工人们定期对路边的梧桐树进行截顶修剪，以促进新枝生长。

The workers ___pollarded the roadside plane trees regularly to encourage new growth.

园丁把那些柳树截去了顶枝，让它们重新长出健康的枝条。

The gardener ___pollarded the willow trees to encourage healthy new growth.