【改写英语句子,写的更加简洁,准确,informative（提供信息的）!将下面18个句子改写的concise,accurate,informative!必有积分重谢!1,thehightemperaturehadtheeffectofmakingthemetalsofter.2,aninvestigationofallpos】

　　改写英语句子,写的更加简洁,准确,informative（提供信息的）!

　　将下面18个句子改写的concise,accurate,informative!必有积分重谢!

　　1,thehightemperaturehadtheeffectofmakingthemetalsofter.

　　2,aninvestigationofallpossiblealternativeswasundertaken.

　　3,threequalitiesoftungstensteelalloysarestrength,ductilityandthey

　　havetobetough.

　　4,accidentscanbeeitherinjuryproducingorcandamageproperty.

　　5,thereisagreatdealtobeexplainedintheareaofunidentifiedflyingobjects

　　6,theaimofcensusanalysisistopredicttheexpectedpopulationatsomespecified

　　futuredate.

　　7,thevoltagemustbedefinitelycheckedatperiodicalintervals.

　　8,thesolderingprovedtobeofanunsatisfactorynature.

　　9,theuseofthismethodwouldeliminatetheproblemofmotordamage.

　　10,ascientistmustobtainadequateevidenceifhewantstoproveatheory.

　　11,scientificinstrumentsandmachinesfrequentlyneedtobeadjustedbeforetheyareused

　　12,inthecaseofradiationstudiesitwasfoundthat...

　　13,itisonthebasisofrecentresearchthatthenewersystemisproposed.

　　14,sulfuricacidwasemployedintheremovalofsurfaceimpuritiesfromthespecimen.

　　15,inanearlyreport,anewequipmentdesignwasoutlinedandanewmethodoffabrication

　　wasdescribed.

　　16,manyofthosetheoriescouldbeeitherdisprovedorsubstantiated.

　　17,expectationisforbidden.

　　18,theexperimentwasdelayedforawhilebecauseofunfavorableweatherconditions.