Passage B
◆Important Words and Expressions◆
inextricable［ˌInIkˈstrIkəbl］adj.from which it is impossible to get free无法摆脱的，不可分的
e.g. 1.There is an inextricable link between leadership and communication.
领导和沟通有着密不可分的联系。
2.The government encountered with inextricable financial troubles.
政府遇到了难以解决的财政困难。
oration［ɔ：ˈreIʃn］n.a formal speech made in public演说，致辞
e.g. 1.He was asked to deliver an oration at the meeting.他受邀在大会上致辞。
2.The president made a National Day oration.总统发表了国庆日演说。
encompass［Inˈkʌmpəs］vt.to include or be concerned with（a wide range of activities，subjects，ideas，etc.）包含；包括，涉及（大范围的活动、课程、计划等）
e.g. 1.The course encompassed the whole English literature since 1850.
这门课程包含了1850年至今的英国文学。
2.The job encompasses a wide range of responsibilities.这项工作涉及的职责范围很广。
flex［fleks］v.to bend or move（a limb，one's muscles，etc.）使（四肢）屈伸，放松
e.g. 1.He slowly flexed his muscles and tried to stand.他慢慢伸展四肢，试着站起来。
2.The runners flexed their muscles as they waited for the race to begin.
赛跑选手活动肌肉，等待比赛开始。
rigorous［ˈrIgərəs］adj.careful，thorough and exact严格的，严密的；精确的
e.g. 1.The planes have to undergo rigorous safety checks.飞机必须经过严格的安全检查。2.Our teacher is so rigorous that he seldom lets up on us.
我们老师非常严格，对我们几乎没有半点松懈。
agility［əˈdʒIləti］n.the ability of moving quickly and easily敏捷；灵活
e.g. 1.She came upstairs with agility.她敏捷地走上楼来。
2.The boy's agility saved his life in the accident.男孩靠敏捷的身手在这场事故中余生。
flip［flIp］v.to send（something）spinning，often into the air，by striking with a light quick blow掷；轻扔
e.g. 1.He filpped the keys onto the desk.他把钥匙轻轻扔到桌上。
2.They flipped a coin to decide who would go first.他们掷硬币决定谁先走。
rise from起因于；起源于
e.g. 1.The quarrel between them rose from a misunderstanding.他们的争吵起因于一个误会。
2.The Yangtze River takes its rise from the Qinghai.长江发源于青海。
in addition to除……之外
e.g. 1.In addition to making art，he sold it，not only dealing his own works but that of other artists.除了创作，他还从事艺术品销售，不仅销售自己的作品，也销售其他艺术家的作品。
2.In addition to the killed and wounded,many were missing.
除了伤亡之外，还有许多人失踪。
break down使失效，使不起作用
e.g. 1.I tried to break down her opposition to our plan.我试着劝阻她对我们计划的反对。
2.This agreement will break down the barriers to free trade.
这个协议将消除自由贸易的障碍。
keep up with赶得上
e.g. 1.Walk faster and keep up with me.走快点，赶上我。
2.I often find myself struggling to keep up with the information.
我时常觉得自己老在追赶资讯。
◆Explanations of Difficult Sentences◆
1.Dance styles rose from street gangs in New York,the Lindy Hop and other African⁃American dance traditions,as well as the smooth styles of soulful musicians and dancers such as James Brown.
•嘻哈舞的风格起源于纽约街头的帮派，林迪舞和其他非裔美国人的传统舞蹈，以及像詹姆斯·布朗那样的充满感情的音乐家和舞蹈家流畅的风格。
•此句中的as well as表示“也，和……一样”，它后面连接的一般是较长的句子，such as是“举例说明”的意思。
2.Popping and locking is basically a series of flexed muscle⁃jerking moves with the arms,legs,neck,shoulders and torso.
•机械舞和锁舞是伴随着胳膊、腿、脖子、肩膀和躯干的一系列的屈伸肌肉的抽动。
•注意句中身体各部位的表达方式以及muscle⁃jerking的用法。名词＋动名词构成的复合词：e.g.handwriting，home⁃cooking，thanksgiving，roller⁃skating…
3.Since your heart and lungs are also muscles,hip⁃hop dancing is a cardiovascular workout that is effective in strengthening your heart and lungs and promoting good blood circulation.
•因为心和肺也是肌肉，街舞实际上是一种很有效的心血管的锻炼，能增强你的心肺功能，促进体内良好的血液循环。
•“That is effective”是定语从句修饰限制“workout”，同时注意“strengthening and promoting”两个并列结构的使用。
4.Frequent and rigorous hip⁃hop dancing sessions can substantially assist in weight loss while toning and strengthening muscles for a lean and sculpted physique.
•经常的和严格的街舞训练课程很大程度上在辅助减肥的同时，还有强健你的肌肉和塑形的功效。
•while＋现在分词引导状语从句。
e.g. I waited in the car while idling the engine.
5.If you enjoy attending night clubs and dance parties,learning hip⁃hop dance moves can help break down any embarrassment or inhibitions you may have about dancing in public or keeping up with current dance trends.
•如果你喜欢去夜总会和舞会，学学街舞舞步会帮助你消除在公共场所跳舞时的尴尬或拘谨，而且能让你追上时代的潮流。
•理解此句的难点有两个：learning hip⁃hop dance moves动名词做主语；you may have about dancing in public是定语从句限制embarrassment or inhibitions。