简介：和你的朋友一起乘船环游世界吧!游戏规则：玩家各拿一个骰子和一枚棋子，轮流掷骰子，并按照骰子上显示的点数移动棋子。

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简介：英国的癌症晚期少年斯蒂芬·萨顿在与时间赛跑，其列出46项遗愿清单中的第一项就是希望为青少年癌症信托基金筹集100万英镑的善款，用以帮助更多的人改善生活。现在他的这个愿望早已实现，善款早已超过300万英镑。为了鼓励斯蒂芬做出的努力，英国首相卡梅伦去医院看望他，并且与他合影留念。

简介：用下面的方法做一些虫虫，然后开展一场虫虫赛跑比赛。

简介：HadaisaTibetan--wordmeaningsilksinTibetanlanguage.Itistra-ditionallyusedasaritualfabricpresentedtothestat-uesofBuddha,LivingBud-dhas,anyreveredpersonorVIP,andduringweddingorfuneralceremony.

简介：Theadvanceinbreadthanddepthofinternationalarmscontrolanddisarma-menthasitsgreatsignificanceineliminatingthethreatofanuclearwarandpro-pellingtheworldsituationonwardinthedirectionofrelaxationoftension.Atthesametime,anegativetrendalsoclaimsourattention.ThestrongmilitarypowersliketheUnitedStatesarecontendingamongthemselvesforretainingtheirmilitarysuperiorityandseizingmilitarysci-techcommandingheightswhileusingthe

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简介：日前，欧宝以可赛车型为基础，打造了一款特别车型，用以唤起车迷对于上世纪60年代征战赛场的拉力赛车欧宝RallyeKadettBSprent的崇拜。这款车型被命名为ColorRace.

简介：Wireraceballbearingshavebeenwidelyusedinhigh-techweapons.Thepreloadofawireraceballbearingiscrucialinengineeringapplications.Inthisstudy,amoreeffectiveapproachisproposedforexactdeterminationofthewireraceballbearingpreload.Anewmathematicalmodelofthepreloadandthestartingtorqueofthewireraceballbearingwasbuiltusingthetheoremofthe3Drollingfrictionresistanceandthenon-conformingcontacttheory.Employingawireraceballbearingwitha1000mmdiameterusedinaspecifictypeofaircraftsimulatingrotarytable,thenumericalanalysisinMATLAB～showedthatthepreloadmagnitudecanbecontrolledintherangeof130–140μm.Asverification,theexperimentalresultswereinagreementwiththetheoreticalresults,andconfirmthefeasibilityofthismethod.Thisnewapproachismoreexactinthepreloadrangeof10–158μmthanthatcomputedbythenumericalmethodreportedinourpreviouswork(Shanetal.,2007b).Thisimpliesthatthepresentmethodcontributestomoreeffectivelypreventingrollingnoise,overturningmomentsandwearofthewireraceballbearing.Thecurrentresearchprovidescriticaltechnicalsupportfortheengineeringapplicationofwireraceballbearingswithlargediameters.

简介：BarackObama’selectionasthe44thU.S.presidentopenedanewchapterinthecountry’shistoryofracerelations,butashissecondtermcomestoanend,black-whitetensionshaveresurfaced50yearsafterthecivilrightsmovement,forcingquestionsaboutthepersistenceofAmericanracismandentrencheddiscriminatorypractices.ManyblackAmericansweredissatisfiedwithhowObamawasdealingwithrace

简介：台风阴影如果问首届“上海杯（临港）帆船赛”的参赛船员或者工作人员，这个赛事给你留下的最大印象是什么，你会经常听到两个字——“台风”。

简介：Background:Previousstudiesoffootstrikepatternsofdistancerunnersinroadraceshavetypicallyfoundthattheoverwhelmingmajorityofshodrunnersinitiallycontactthegroundontherearfoot.However,noneofthesestudieshasattemptedtoquantifyfootstrikepatternsofbarefootorminimallyshodrunners.Thisstudyclassifiesfootstrikepatternsofbarefootandminimallyshodrunnersinarecreationalroadrace.Methods:High-speedvideofootagewasobtainedof169barefootand42minimallyshoddistancerunnersatthe2011NewYorkCityBarefootRun.Footstrikepatternswereclassifiedforeachrunner,andfrequenciesofforefoot,midfoot,andrearfootstrikingwerecomparedbetweenthebarefootandminimallyshodgroups.Results:Atotalof59.2%ofbarefootrunnerswereforefootstrikers,20.1%weremidfootstrikers,and20.7%wererearfootstrikers.Forminimallyshodrunners,33.3%wereforefootstrikers,19.1%weremidfootstrikers,and47.6%wererearfootstrikers.Footstrikedistributionsforbarefootandminimallyshodrunnersweresignificantlydifferentbothfromoneanotherandfrompreviouslyreportedfootstrikedistributionsofshodroadracers.Conclusion:Footstrikepatternsdifferbetweenbarefootandminimallyshodrunners,withforefootstrikingbeingmorecommon,andrearfootstrikinglesscommoninthebarefootgroup.

简介：图中是2000年度的奔驰“拖头”赛车模型,由德国保罗模型公司(Paul'sModelArt)生产。“保罗模型”名扬海外近十年,素以向收藏者提供工艺复杂的模型精品着称于世,Minichamps品牌是保罗公司的代表性产品,“保罗”以赛车起家,其制造的赛车系列品种全,工艺精,素执同业牛耳,近年来增加了房车系列,古典精品与现代风格路车交相辉映是其模型的主要特点。奔驰“拖头”模型的比例为1:43,锌合金材质,长14cm,高

简介：大众集团近几年仿佛对达喀拉力赛异常感冒，继途锐赛车一代以后，今年又推出了第二代的途锐赛车（RaceTouareg2），希望它能为大众车队带来更好的成绩。

简介：复兴之后的迈凯伦极为热衷于参加全球各项顶级GT赛事,并且取得了相当不错的战绩。就在650SGT3推出后不久又推出了全新的570SGT4racecar,用以参加2016英国GT锦标赛（BritishGTChamipionship）。全新的570SGT4racecar赛车由迈凯伦GT赛车竞技部门和CRSGT独立汽车运动公司合作研发。基于迈凯伦旗下SportsSeries系列的570S车型打造并按照英国GT锦标赛的规则进行改装。

简介：Background：Mathematicalmodelsproposeleglengthasalimitingfactorindeterminingthemaximumwalkingvelocity.Thisstudyevaluatedtheeffectivenessofaleglength-basedmodelinpredictingmaximumwalkingvelocityinanappliedracewalkingsituation,bycomparingexperiencedandnoviceracewalkersduringconditionswherestrictlynoflighttime（FT）waspermittedandinsimulatedcompetitionconditions（i.e.,FT〈40ms）.Methods：Thirty-fourparticipants（18experiencedandl6noviceracewalkers）wererecruitedforthisinvestigation.AnOptojumpNextsystem（8m）wasusedtodeterminewalkingvelocity,stepfrequency,steplength,groundcontacttime,andFTduringracewalkingoverarangeofvelocities.ComparisonsweremadebetweennoviceandexperiencedparticipantsinpredictedmaximumvelocityandactualvelocitiesachievedwithnoflightandvelocitieswithFT〈40ms.Thetechnicaleffectivenessoftheparticipantswasassessedusingtheratioofmaximumvelocitytopredictedvelocity.Results：Innovices,nosignificantdifferencewasfoundbetweenpredictedandmaximumwalkingspeedswithoutFTbuttherewasasmall5.8%gaininmaximumspeedwhenFT≤40ms.Inexperiencedracewalkers,therewasasignificantreductioninmaximumwalkingspeedcomparedwithpredictedmaximum（p〈0.01）anda11.7%gaininmaximumwalkingspeedwithFT〈40ms.Conclusion：Leglengthwasagoodpredictorofmaximalwalkingvelocityinnovicewalkersbutnotagoodpredictorofmaximumwalkingspeedinwell-trainedwalkerswhoappeartohaveoptimisedtheirwalkingtechniquetomakeuseofnon-visibleflightperiodsoflessthan40ms.Thegaininvelocityabovepredictedmaximummaybeausefulindexofracewalkingproficiency.