Theuniversetravelisadreamofallhumanbeens,maybeyouhaveimagedsinceyouareasmallbaby!Nowthisdreamwhichseemsimpossiblebecomestrue!Wow,that'sreallysoundsgreat!Butisitreallygoodforus?Iwillgiveouttheadvantageanddisadvantagesinmymind:throughspacetravelwecanfindoutmorelivingthingsintheuniverse,andwealsocanmakefriendswiththemsothatwecanadvanceourscientificknowledge!ButanotherwayitmaycausewarjustlikeStarWarsCloneWars!Andwecanfindoutmoreelementsthatourearthdidn'thave!Butitmaycauseeconomywar,someonemayfightwithothersbecauseofit!
Thatall!
还有一篇:Inspiteoftherapidgrowthofeconomyandtechnology,ourenvironmenthasbeenseriouslypolluted.Itismainlybecausetherehasbeenavastamountoftrash.Thereasonswhywehavemoreandmoretrashareasfollows.First,thenumberofpeoplewhoproducetrashisontheincrease.Second,wedonothaveenoughspacetohavegarbagedumped.Third,alotofrubbishwhichcanbereusedthanthrownawaybypeople.
Hereareseveralwayswecanusetohelpdecreasetheamountoftrash.First,weshouldgetthepublicre-educatedandletthemknowthefactthattrashpollutesourenvironmentandisharmfultoourhealth.Second,wesuggestourgovernmentenactstrictlawstocrackdownuponpeoplewholittergarbagehereandthere.Third,wecancallonourneighborstoreuseasmanythingsastheyhaveusedaspossible.Thus,wecanhaveacleanerenvironmenttolivein