有一只手摇水泵用来排水。There is a manual pump to get rid of the water.土壤排水畅通，鼻涕虫就不会造成什么麻烦。The soil drains freely and slugs aren't a problem.陡峭的石头地面排水性能很好。The steep, stony ground is well drained....
苹果树应该什么时候剪枝？When should you prune apple trees?玫瑰花越开越少. 该是剪枝的时候了.Roses are out of bloom. It is time to prune the roses.提出的剪枝方案降低了决策树的计算复杂度.The proposed pruning stragey reduced computational complexity of the decision tree...