No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages, if there were no density- 英语长难句解析

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句子

No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages, if there were no density-dependent effects, the population would, in the long run, either increase or decrease without bound (barring a miracle by which gains and losses canceled exactly).

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. 主从复合句

2. 原句中的各个子句，子句类型以及连接词

主句

The population would, in the long run, either increase or decrease without bound (barring a miracle exactly).

子句类型:

主句

连接词:
分句-1

No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages.

子句类型:

状语从句

连接词: NO MATTER HOW
分句-2

There were no density-dependent effects.

子句类型:

状语从句

连接词: IF
分句-3

Gains and losses canceled by a miracle.

子句类型:

定语从句

连接词: BY WHICH

3. 句子成分

主句

The population [主语] would [谓语], in the long run, [插入语] either increase or decrease [谓语] without bound (barring a miracle exactly). [状语]
分句-1

No matter how severely or unpredictably [状语] birth, death and migration rates [主语] may be fluctuating [谓语] around their long-term averages. [状语]
分句-2

There [表语] were [系动词] no density-dependent effects. [主语]
分句-3

Gains and losses [主语] canceled [谓语] by a miracle. [状语]

4. 句子翻译

主句

The population would, in the long run, either increase or decrease without bound (barring a miracle exactly).

从长远来看，这个种群的数量将无限地增加或减少（从而阻碍了奇迹发生）。
分句-1

No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages.

无论出生率、死亡率还是迁徙规律相对于长期的平均值的变化是如何的剧烈和不可预测。
分句-2

There were no density-dependent effects.

没有种群密度无关因素。
分句-3

Gains and losses canceled by a miracle.

有了这个奇迹，增减正好相互抵消。
全句

No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages, if there were no density-dependent effects, the population would, in the long run, either increase or decrease without bound (barring a miracle by which gains and losses canceled exactly).

无论出生率、死亡率还是迁徙规律相对于长期的平均值的变化是如何的剧烈和不可预测，如果没有种群密度无关因素，从长远来看，这个种群的数量将无限地增加或减少（从而阻碍了增减正好相互抵消的奇迹发生）。

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考点解析

根据朗播专家权威分析，句子“No matter how severely or unpredictably birth, death and migration rates may be fluctuating around their long-term averages, if there were no density- 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：