简介:重点词汇1.tourn.&v.旅行;旅游MybrotherhasjustleftSydneyforatouroftheworld.我哥哥刚离开悉尼去周游世界。Wetourbycareverysummer.每年夏天我们都驾车出外旅行。拓展touristn.旅行者;观光者2.protectv.保护;防护protect...from/against...保护……免遭……Apurpleheadscarfprotectedherfrom/againstthewind.一条紫色头巾为她挡风。
简介:1.ObjectivesAsthediscoveryofgashydrateinQilianMountainpermafrostin2008,themaincontrollingfactorsanddistributionofgashydratearenotclear.Thisrestrictsthefurtherprogressingashydratesurveyinthisarea.Hence,ChinaGeologicalSurveyerectedtheproject"ExplorationofgashydrateresourcesintheQilianMountainanditsadjacentareas"continuouslytobetterunderstandthegashydrateaccumulationintermsofgreatergashydratediscovery.
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简介:TheQilianMountainactivesourcenetworkdatawasprocessedusingthemethodsofstacking,cross-correlationandinterpolation,andtheairguntraveltimevariationcharacteristicsofPandSwavesaroundtheJanuary21,2016MS6.4Menyua,Qinghaiearthquake.Theresultsshowthatabout6monthsbeforetheearthquake,therelativetraveltimeofthreestationsneartheepicentershowedadeclinedchange(traveltimedecrease),andsuchachangeoflowvalueanomalywasrecoveredabout3monthsbeforetheearthquake.Thetraveltimedecreasethenappearedagain,andtheearthquakeoccurredduringtherecoveryprocess.ThemaximumdecreaseoftheS-wavetraveltimewas18ms,andthechangeintraveltimereturnedtonormalaftertheearthquake.Thevariationtrendofthe3stationsisconsistent,includingtheS-wavetraveltimechangeofstationZDY38,whichisnearesttotheepicenterandchangedobviously,andthevariationrangeofthetraveltimeissmalleratthestationsafar.Thisvariationpatternisrelatedtothepositionoftheseismicsource.Theshortertraveltimemeansthevelocityincrease,whichmayberelatedtotheregionalstressaccumulation.