首页 - Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum; however, even copper and zinc, which are essen
句子
Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum; however, even copper and zinc, which are essential elements, can become toxic in high concentrations.
问题
句子分析（俗称“长难句分析”）是训练提高基础阅读能力的有效手段。我们通过对托福(TOEFL)、雅思(IELTS)、GRE、考研以及四六级等考试中真实出现过的句子（如真题、TPO，剑桥系列）进行结构化分析，可以有效提升句子理解的准确性和效率。朗播通过近百万的用户实际数据分析发现，练习 300-400 个句子，会让阅读能力有显著提升。请按顺序阅读句子，并思考：

1. 句子属于哪种结构类型？简单句？并列复合句？主从复合句？
2. 句子由哪些子句构成，连接这些子句的关联词是什么？
3. 每个子句中各个语法成分分别是哪些？
4. 句子的中文意思是什么？
学会分析长难句 ----> 上朗播网 答案
1. 并列复合句
2. 原句中的各个子句，子句类型以及连接词
  • 子句-1
    Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum.
    子句类型:
    并列句
    连接词:
  • 子句-2
    Even copper and zinc can become toxic in high concentrations.
    子句类型:
    并列句
    连接词: HOWEVER
  • 子句-3
    Copper and zinc are essential elements.
    子句类型:
    定语从句
    连接词: WHICH
3. 句子成分
  • 子句-1
    Research [主语] has focused on [谓语] the toxic effects [宾语] of heavy metals [定语] such as lead, cadmium, mercury, and aluminum. [同位语]
  • 子句-2
    Even [状语] copper and zinc [主语] can become [系动词] toxic [表语] in high concentrations. [状语]
  • 子句-3
    Copper and zinc [主语] are [系动词] essential elements. [表语]
4. 句子翻译
  • 子句-1
    Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum.
    对重金属（比如铅、镉、汞、铝）的毒性已经做了重点研究。
  • 子句-2
    Even copper and zinc can become toxic in high concentrations.
    即使是铜和锌在高浓度的情况下也会变得具有毒性。
  • 子句-3
    Copper and zinc are essential elements.
    铜和锌是必需元素。
  • 全句
    Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum; however, even copper and zinc, which are essential elements, can become toxic in high concentrations.
    对重金属（比如铅、镉、汞、铝）的毒性已经做了重点研究，然而，即使是必需元素铜和锌在高浓度的情况下也会变得具有毒性。
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考点解析
根据朗播专家权威分析，句子“Research has focused on the toxic effects of heavy metals such as lead, cadmium, mercury, and aluminum; however, even copper and zinc, which are essen 英语长难句解析 ”主要针对以下知识点进行考查，关于这些知识点的讲解如下：
并列复合句
并列复合句含有两套或者更多相互并列的主谓结构的句子。
①Water has weight; air has weight too, but it is very light.
②Heat is energy, so is electricity.
并列句
并列句是构成并列复合句的简单句。
①I like action movies but I don't like thrillers.
②Take the chance, or else you will regret it.
定语从句
在主从复合句中，对名词（或者整个句子）限定修饰，起定语作用的句子，就是定语从句。
①They rushed over to help the man whose car had broken down.
②The school that he once studied in is very famous.
表语
表语是用来说明主语的身份、性质、品性、特征和状态的成分。
①That remains a puzzle to me.
②The sun is up.
宾语
宾语是指一个动作（动词）的接受者，分为直接宾语和间接宾语两大类，直接宾语指动作的直接对象，间接宾语说明动作的非直接，但受动作影响的对象。一般而言，及物动词后面最少要有一个宾语，而该宾语通常为直接宾语，有些及物动词要求两个宾语，则这两个宾语通常一个为直接宾语，另一个为间接宾语。
①He didn't say anything.
②We sent him a letter.
定语
定语是用来修饰、限定、说明名词或代词的品质与特征的成分。
①In science, a theory is a reasonable explanation of observed events.
②Possible solutions to the problem are formulated.
同位语
一个名词(或其它形式)对另一个名词或代词进行修饰，限定或说明，这个名词（或其它形式）就是同位语。
①A new household convenience, the icebox, a precursor of the modern refrigerator, had been invented.
②Most of them range in size from $5,000 to $12,500, a welcome sum to many young practitioners.
谓语
谓语对主语动作或状态的陈述或说明,指出“做什么”、“是什么”或“怎么样”。
①It is used by travelers and business people all over the world.
②I made your birthday cake last night.
系动词
本身有词义，但不能单独用作谓语，后边必须跟表语，构成系表结构说明主语的状况、性质、特征等情况。
①That is air wrung dry of moisture.
②There seem to have been several periods within the last tens of thousands of years.
主语
主语是句子陈述的对象，说明是谁或什么，表示句子说的是"什么人"或"什么事"。
①My school is not far from my house.
②To do such a job needs more knowledge.
状语
状语是谓语里的另一个附加成分,从情况、时间、处所，方式、条件、对象，肯定、否定、范围和程度等方面对谓语中心（或者整个句子）进行修饰或限制。
①In a way, any hypothesis is a leap into the unknown.
②It extends the scientist's thinking beyond the known facts.
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学员笔记

笔记分享

  • July33 分享于 2015-10-28 03:05
    toxic effects 毒性 in high concentrations. 在高浓度的情况下 heavy metals 重金属
    0
  • 拜拜~ 分享于 2015-11-15 05:03
    focus on：自然含义（重点研究） 高浓度：in high concentrations. heavy metals
    0
  • 大脚丫 分享于 2015-09-16 09:13
    toxic effect heavy metals copper and zinc high concentration
    0
举一反三
解密长难句真相 ----> 上朗播网 同样有定语从句的句子
解密长难句真相 ----> 上朗播网 同样有并列句的句子
长难句分析
长难句分析是训练提高基础阅读能力的有效手段。熟练掌握 300 个左右的长难句，可有效解决托福阅读速度慢、读不懂的问题。
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