托福阅读长难句:呼吸空气交换量

2022-06-02 05:47:44

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  托福阅读长难句:The amount of air exchanged is even lower in REM than NREM because, although breathing is more rapid in REM, it is also more irregular, with brief episodes of shallow breathing or absence of breathing. (TPO24 Breathing During Sleep)

  结构标记:The amount(主语)of air exchanged (介词短语作后置定语)is(谓语) even lower(表语) in REM than NREM because, although breathing is more rapid in REM(让步状语从句), it is also more irregular(原因状语从句), with brief episodes of shallow breathing or absence of breathing(介词短语作状语).

  托福阅读长难句句子分析:本句的主句是The amount of air exchanged is even lower in REM than NREM。在主句之后是because引导的原因状语从句:because it is also more irregular。而在这个原因状语中,插入了although引导的让步状语从句,造成一定的阅读困扰,可以先跳过。本句最后with的介词短语则是作为伴随状语。

  托福阅读长难句词汇精记:

  REM是rapid eye movement的缩写,指的是睡眠中快速眼球运动的阶段,也叫浅度睡眠阶段;NREM是non-rapid eye movement的缩写,指的是睡眠中无快速眼球运动的阶段,也叫深度睡眠阶段。

  irregular作形容词,表示“不规则的;无规律的;不定期的”,比如:His heartbeat sounded irregular. 他的心跳听起来不均匀。Jason’s attendance at school has been somewhat irregular. 杰森一直有点不按时上学。

  brief作形容词,表示“短暂的;简洁的”,比如:Could I have a brief word with you, Mr Thomas? 托马斯,我能和你说几句话吗?a brief note of thanks 简短的感谢信。brief作名词,还有“摘要”的意思,比如:He drew up a brief for his speech. 他起草了一份讲话的摘要。

  episode作名词,表示“(一系列事件中的)一个事件;(单独的)一段时间;插曲”,比如:It is one of the saddest episodes in the history of the army. 这是军队历史上最令人伤心的事件之一。该词是托福阅读词汇题所考查过的单词,与“occurrence”意思接近。

  shallow作形容词,表示“浅的;肤浅的”,比如:serve the noodles in a shallow bowl 用浅碗盛面条。He seemed to have only a shallow understanding of his subject. 他对他所修的科目似乎只是一知半解。

  托福阅读长难句参考译文:REM的空气交换量要比NREM低,因为尽管在REM中呼吸更加急促,但也更加没有规律,会伴随简短的浅呼吸或者呼吸暂停。

  背景补充:人的睡眠可分为快速眼动(Rapid Eye Movement)睡眠和非快速眼动(Non-rapid Eye Movement)睡眠两种。在REM阶段中,睡眠者的眼球有快速跳动的现象,而且呼吸和心跳呈现不规则(irregular)。大多数人在醒来后,可以回忆清楚的梦境都是发生在REM睡眠的时候,它是全部睡眠阶段中最浅的时候。而在NREM阶段中,睡眠者没有眼球运动,全身肌肉松弛(relax),基础代谢率(basic metabolic rate)也较低。

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