原文摘自每日英语听力2.18内容“ Grazing Deer Altet Forest Acoustics”
lotta deer
That deer are altering the very acoustics of the forest, by pruning trees and changing the way sounds—like bird calls—travel through the trees.
The findings might give advocates for increased deer management a bit more ammunition.
1.找主干
加粗部分即句子主干
2.逐句看
That deer are altering the very acoustics of the forest, by pruning trees and changing the way sounds -like bird calls-travel through the trees.
主干是：That deer are altering acoustics.（鹿子正在改变acoustics.）acoustics：传声效果
问：改变了什么传声效果？
答：1.of the forest（森林的）
2.the very（同一的，正是的，恰好的〔用以加强语气〕）
问：怎么改变的？
答：通过（by）1.by pruning trees（折断树（枝））
2.changing the way sounds like bird calls-travel through the trees.（改变了声音（比如鸟叫）在树林里的传播路径）。
The findings might give advocates for increased deer management a bit more ammunition.
主干是：The findings give advocates ammunition.（这些发现给了提倡者证据。）advocates：提倡者，ammunition：弹药、证据
问：这些发现很权威吗？
答：might（不是很权威）
问：什么的提倡者？
答：for increased deer management（加强鹿管制的提倡者）
问：多少证据？
答：a bit more（多一点）
网友评论