托福閱讀復雜長難句句式分析實例解讀：人為什么會打哈欠？在托?？荚囍?，長難句常常讓考生感到困惑，尤其是當句子結構復雜時,。本文將以“打哈欠的神秘”為例,，幫助考生理解和分析長難句,，從而提升閱讀能力。

Sentence Analysis

This sentence comes from the official TOEFL practice test, Official 18, specifically from the article titled The Mystery of Yawning. Many students find this sentence particularly challenging. First, we need to identify the main verbs in the sentence, which are takes place and serves. One of the difficulties in this sentence is the phrase through deeper breathing, which is an inserted clause that can be skipped initially for easier comprehension. By focusing on the surrounding content, we can connect it directly to by reversing the drop in blood oxygen levels, followed by the relative clause that are caused by... that modifies blood oxygen levels. Additionally, within this relative clause, there is another embedded relative clause that accompanies... which modifies breathing.

Vocabulary Review

Sentence Translation

Finally, let's read the translation of this sentence: “According to traditional theories, people yawn when they feel bored or sleepy. Lack of sleep or feelings of boredom can lead to shallow breathing, which causes a decrease in blood oxygen levels. Yawning can reverse this decrease in blood oxygen levels through deeper breathing, thereby enhancing alertness.”

以上就是托福閱讀中長難句的訓練分析介紹,，希望大家能夠學到有效的訓練和提升方法,，讓自己更為輕松地面對長難句得到高分。

托福閱讀長難句解析：提升你的閱讀理解能力

對于許多托?？忌鷣碚f,，閱讀部分常常是一個挑戰(zhàn)。尤其是長難句的理解,，往往讓人感到無從下手,。本文將分享一些解析長難句的技巧，幫助你在托?？荚囍腥〉酶玫某煽?。

1. 理解句子結構

長難句通常包含多個從句和修飾成分。首先,，要識別主句和從句,。比如，在以下句子中：

“Although the research was conducted over a decade, the results were still relevant to current practices.”

主句是“the results were still relevant to current practices”,，而“Although the research was conducted over a decade”是一個讓步狀語從句,。理解這些結構可以幫助你抓住句子的核心意思。

2. 尋找關鍵詞

在長難句中,，關鍵詞能幫助你快速理解句子的主要內(nèi)容,。例如，在句子中尋找動詞,、名詞等重要成分,，可以幫助你理清句子的邏輯關系。比如：

“The discovery of new species in the rainforest, which has been ongoing for years, highlights the importance of biodiversity.”

這里的關鍵詞是“discovery”,、“species”和“highlights”,，它們指向了句子的中心思想。

3. 分段閱讀

對于特別復雜的長難句,，可以嘗試將其拆分成幾個部分逐一理解,。這樣可以避免信息過載。例如：

“Despite facing numerous challenges, the team was able to complete the project on time, which impressed the stakeholders.”

可以拆分為：“Despite facing numerous challenges” + “the team was able to complete the project on time” + “which impressed the stakeholders”,。每一部分都相對簡單,，更易于理解。

4. 多做練習

練習是提高閱讀理解能力的關鍵,。建議考生多做一些托福閱讀練習題,，特別是針對長難句的解析。可以參考以下題目進行訓練：

“The increase in urbanization has led to significant changes in local ecosystems, affecting both flora and fauna.”

理解這個句子時,，可以關注“increase”,、“changes”、“affecting”等關鍵詞,，幫助你理解句子的主要意義,。

5. 使用輔助工具

在備考過程中，可以使用一些輔助工具,，如在線詞典和語法分析軟件，來幫助你更好地理解長難句,。推薦使用：

• Merriam-Webster Dictionary
• Grammarly
• Cambridge English Online

6. 參加閱讀小組

與其他考生一起討論閱讀材料,，分享各自的理解和解析方法，也是非常有效的學習方式,。你可以加入線上或線下的托福備考小組,，互相學習，共同進步,。??

希望以上的解析技巧能夠幫助你在托福閱讀中更好地應對長難句的挑戰(zhàn),！通過不斷的練習和積累，你一定能夠提升自己的閱讀理解能力,，順利通過托?？荚嚒＜佑?！??

Understanding the Science Behind Yawning

Yawning is a common behavior that many of us experience daily, yet its scientific explanation remains a topic of curiosity. As TOEFL candidates, understanding such phenomena can enhance your reading comprehension and provide interesting talking points in speaking sections. Let’s explore the scientific reasons behind yawning and how it relates to our bodies and brains.

The Physiology of Yawning

Yawning usually occurs when we are tired, bored, or even when we see someone else yawn. But why does this happen? One widely accepted theory is that yawning helps to regulate brain temperature. When we yawn, we inhale deeply, which increases the flow of air into our lungs and cools down the brain. This cooling effect may help improve alertness and mental function. ??

Yawning as a Social Cue

Interestingly, yawning is also considered a social behavior. Studies suggest that seeing someone yawn can trigger an automatic response in others, leading them to yawn as well. This phenomenon is known as “contagious yawning.” It’s believed to be linked to empathy and social bonding, indicating that our brains are wired to respond to the actions of others. ??

Physiological Triggers for Yawning

Several physiological factors can trigger yawning. For example, lack of sleep is a significant contributor. When we don’t get enough rest, our bodies signal the need for oxygen and alertness, prompting a yawn. Additionally, yawning can occur during transitions between different states of alertness, such as waking up or winding down for sleep. This transitional yawning highlights the connection between our physical state and our brain's activity. ??

Yawning and Oxygen Levels

Another theory suggests that yawning serves to increase oxygen intake. When we yawn, we take a deep breath, which may help raise the levels of oxygen in our blood. However, research on this theory is mixed. Some studies indicate that yawning does not significantly affect blood oxygen levels, suggesting that the relationship between yawning and oxygen is more complex than previously thought. ??

Yawning in Animals

It’s fascinating to note that yawning is not exclusive to humans. Many animals, including dogs, cats, and even fish, exhibit yawning behavior. This raises questions about the evolutionary significance of yawning. Some researchers believe that yawning could have developed as a way to communicate within species, serving similar social functions as seen in humans. ??

Conclusion

In summary, yawning is a multifaceted behavior with various physiological and social implications. Understanding the science behind yawning can not only pique your interest but also enhance your grasp of related vocabulary and concepts, which is beneficial for your TOEFL preparation. ?? As you study, consider how such everyday behaviors connect to broader scientific principles, enriching your knowledge and conversation skills.