英语翻译

英语翻译
Twenty trees were
randomly selected from 30 trees for which the biochemistry of leaves had been previously studied.Three ramets were assigned for the experiment in
each of the ten control trees.In the browsing trees,three
ramets were randomly assigned for clipping,which
simulated winter browsing by mammals,and three
became control ramets.The within-tree controls were
included in the design to study if the effects of clipping
spread through a tree into other than the damaged
ramets.