介绍:
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凯西女士 专注托福 sat gre 第七年
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16.To appreciate fully the diversity and abundance of life in the sea，it helps to think small．
(特殊结构it helps to…做…有帮助)
要充分认识海洋生命的多样性和丰富性，从小的角度思考有帮助。
目的状语：To appreciate fully the diversity and abundance of life in the
sea,
主句： it helps to think small．（这里的it是形式主语，没有实际意义）
1 7.Science is built with facts just as a house is built with bricks，but a collection of facts cannot be called science any more than a pile of bricks can be called a house．
(特殊结构not any more than像…一样不…)
科学建立在事实上，就像房子用砖砌成一样。但收集的事实不能被叫做科学，就像一堆砖不能被称为房子一样。
分句1. Science is built with facts just as a house is built with bricks,
分句2. but a collection of facts cannot be called science any more than a pile of bricks can be called a house.
1和2是并列分句 （转折关系）
18.The variation between the hemispheres corresponds to which side of the body is used to perform specific activities．(从句which side…is used…作corresponds to的宾语两个半球之间的不同与身体的哪一部分用于进行特定的活动是对应的。
分句1. The variation between the hemispheres corresponds to
分句2. which side of the body is used to perform specific activities．
1和2是嵌套 1是主句，2做主句的宾语
19.In a period characterized by the abandonment of so much of the realistic tradition by authors such as John Barth，Donald Barthelme，and Thomas Pynchon, Joyce Carol Oates has seemed at times determinedly old-fashioned in her insistence OD the essentially mimetic quality of her fiction．
(特殊结构characterized by…——以…为特征)
尽管处于一个以抛弃大量现实主义传统(以作家约翰·巴思、唐纳德·巴塞尔姆和托马斯．品钦为代表)为特征的时代，乔伊斯·卡罗尔·欧茨因为坚持自己小说本质上模仿的特点，有时候看起来是一个坚定的守旧派。
分句1. characterized by the abandonment of so much of the realistic tradition by authors such as John Barth，Donald Barthelme，and Thomas
Pynchon,
分句2. Joyce Carol Oates has seemed at times determinedly old-fashioned in her insistence OD the essentially mimetic quality of her fiction．
分句1 做时间状语“In a period”的后置定语，补充修饰period，相当于省略了 “which was”的定语从句
分句2 是主句
20．If it were not for this faculty，they would devour all the food available in short time and would probably starve themselves out of existence．
(虚拟语气)
如果不是具有这种能力，它们就会在短时间内吞掉所有能得到的食物，而且很可能会因饿死而灭绝。
分句1. If it were not for this faculty
分句2. they would devour all the food available in short time
分句3. would probably starve themselves out of existence
分句1 是虚拟句的条件从句
分句2、3是并列， 主句
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