maintenance pruning

例句：

1. 1.The lawn needs regular maintenance pruning to keep it healthy.
   草坪需要定期维护修剪以保持健康。
2. 2. Maintenance pruning is essential for the health of the trees.
   维护修剪对树木的健康至关重要。
3. 3.The gardener uses a sharp knife for maintenance pruning.
   园丁使用一把锋利的刀进行维护修剪。