老精选：月球和火星的重力。托福听力考试中经常见到天文类的考题，这部分考题如果没有一些必要的常识是很难回答的，所以大家在平时的备考中一定多积累这方面的词汇和素材。为帮助大家了解天文类的托福听力考题，今天给大家带来一篇老托福听力文本精选：月球和火星的重力，希望同学们喜欢。
LoctedttheNASAReserchCenterinIowis5,000-gllonvtofwter,ndinsidethetnkisnunderwtertredmilldesignedbyDvNewmn,nerospceengineer.ForfouryersNewmnobservedscubdiversstheysimultedwlkingontheMoonndonMrsonherunderwtermovingbelt.ShewntedtodiscoverhowthegrvityoftheMoonndofMrswouldffecthumnmovement.Todothis,Newmnttchedweightstothediversndthenloweredthemintothetnkndontothetredmill.TheseweightswerecrefullydjustedsothtthediverscouldexperienceunderwterthegrvityoftheMoonndofMrsstheywlkedonthetredmill.NewmnconcludedthtwlkingonMrswillprobblybeesierthnwlkingontheMoon.TheMoonhslessgrvitythnMrsdoes,sotlunrgrvity,thediversstruggledtokeeptheirblncendwlkedwkwrdly.ButtMrtingrvity,thedivershdgretertrctionndstbilityndcouldesilydjusttopceof1.5milesperhour.AsNewmngrdullyincresedthespeedofthetredmill,thediverstooklonger,grcefulstridesuntiltheycomfortblysettledintonevenquickerpce.NewmnlsonotedthttMrtingrvity,thediversneededlessoxygen.ThedtNewmncollectedwillhelpinthefuturedesignofMrtinspcesuits.Compredtolunrspcesuits,Mrtinspcesuitswillrequiresmllerirtnks;nd,tollowforfreermovement,theelbowndkneeresofthespcesuitswilllsobeltered.
【生词摘录】
1.gllon:n.AmEunitformesuringliquids,equlto3.785litres【美】加仑(等于3.785升)
2.vt:n.[C]verylrgecontinerforstoringliquidssuchswhiskyordye,whentheyrebeingmde(酿酒、盛染料用的)大缸，大桶
3.tnk:n.[C]lrgecontinerforstoringliquidorgs(盛放液体或气体的)大容器
4.tredmill:n.[C]millworkedinthepstbyprisonerstredingonstepsfixedtoverylrgewheel(过去用以惩罚犯人的)踏车
5.erospce:dj.involvingthedesigningndbuildingofircrftndspcevehicles航空和航天(器制造)的n.[U]theindustrythtdesignsndbuildsircrftndspcevehicles航空和航天工业，航天工业
6.scubdiving:n.[U]thesportofswimmingunderwterwhilebrethingthroughtubeconnectedtocontinerofironyourbck斯库巴潜泳，水肺潜泳(戴自携式潜水呼吸器潜泳)
7.simulte:v.tomkeorproducesomethingthtisnotrelbuthstheppernceofbeingrel模仿，模拟
8.Mrtin:dj.oforreltingtotheplnetMrs火星的
9.stride:n.[C]longstep大步，阔步
10.elbow:n.[C]thejointwhereyourrmsbends肘
老托福听力文本精选：月球和火星的重力就是这样的，同学们读懂了吗?更多相关的考题大家可以咨询