sapling的复数形式怎么拼写？

She plucked some leaves off the sapling.她从树苗上摘下一些叶子.A sapling needs pruning, a child discipline.小树要砍, 小孩要管.She cut down the sapling with one chop.她一斧子就把树苗砍倒了....

sapling的音标：sapling的英式发音音标为：['sæplɪŋ]sapling的美式发音音标为：['sæplɪŋ]...

n.幼树，树苗...