Wild life zoologist Hulmut Buechner(1953), in reviewing the nature of biotic changes in Washington through recorded time, says that "since the early 1940s, the state has had more deer than at any other time in its history, the winter population fluctuating around approximately 320,000 deer ( mule and black-tailed deer), which will yield about 65,000 of either sex and any age annually for an indefinite period".(65, TPO4)>>托福考试提分方法

biotic /baɪ'ɒtɪk/ adj. 关于生命的，生物的

fluctuate /'flʌktʃʊeɪt/ v. 涨落，波动

approximately /ə'prɑksɪmətli/ adv. 大约

yield /jiːld/ v. 生产，产生;屈服，让步;

我是分界线，大家先自己分析哦。

Wild life zoologist Hulmut Buechner(1953), (in reviewing the nature of biotic changes in Washington through recorded time), says that ("since the early 1940s, ) the state has had more deer than at any other time in its history, (the winter population fluctuating around approximately 320,000 deer (mule and black-tailed deer), ) (which will yield about 65,000 of either sex and any age annually for an indefinite period".)

分析：

修饰一：(in reviewing the nature of biotic changes in Washington through recorded time)，插入语，其中还有两个介词(in Washington) (through recorded time)

中文：回顾在华盛顿有记录的时间内生物变化的特性

修饰二：(since the early 1940s) ，介词短语

中文：自从20世纪40年代早期

修饰三：(the winter population fluctuatingaround approximately 320,000 deer (mule and black-tailed deer)) ，大家能看懂这个修饰即可。其实这里有一个独立主格结构，嗯，好吧，不知道也能看懂的。

中文：冬季鹿群的数量在大约32万只鹿(杂交鹿和黑尾鹿)左右波动

修饰四：(which will yield about 65,000 of either sex and any age annually for an indefinite period".)，从句，修饰winter population，其中for an indefinite period表示不定期

中文：这些鹿群每年将会不定期繁殖出各个年龄段的公鹿和母鹿各大约6.5万只

主干：Wild lifezoologist Hulmut Buechner(1953) says that，后面接宾语从句

参考翻译：

野生动物学家Hulmut Buechner(1953)在回顾华盛顿有记录的时间内生物变化的特性之后说道：“从20世纪40年代早期，华盛顿州拥有鹿的数量比以历史任何时期都多，冬季鹿群的数量在大约32万只鹿(杂交鹿和黑尾鹿)左右波动，这些鹿群每年将会不定期繁殖出各个年龄段的公鹿和母鹿各大约6.5万只”

这个句子的主要修饰成分就是从句、插入语、介词短语以及一个独立主格，大家务必想清楚，每一个修饰成分修饰的是什么，才能看清楚这个句子的结构。